* changes:
  Add ION usage into dumpsys report and account ION pools as kernel cache
  Improve cached kernel memory accounting using meminfo KReclaimable field
  Add JNI API to query sizes of ION heaps, pools and mapped part of the heaps

This CL is a partial cherrypick of ag/9686088. This is needed because new
changes to libstatssocket (that need to be cherrypicked into AOSP) wrap
#write_to_statsd() with #write_buffer_to_statsd().

Bug: 143978873
Test: m -j
Test: flashes successfully
Test: DocumentsUI(a Mainline module) is able to successfully log to statsd
Change-Id: I886331f728ccaa3d281b5683eb89179aa73596b6
Merged-In: I9cdc6151d8feb29a712532e50f143af9d52c8d94

Replace with TelephonyUtils.IS_DEBUGGABLE and actual call

Test: build
Bug: 140908357
Change-Id: I9e33c2fe426521b8e186cb8e1e5bd7be06992b52

Test: manual
Bug: 136194151
Change-Id: I5c9732062e5123539343843fb9a9ae3ca7111890
Merged-In: I5c9732062e5123539343843fb9a9ae3ca7111890

Fix issue introduced by commit d32a94d2 where in case of an
A2DP disconnection, the device was disconnected then reconnected.

Bug: 146544156
Test: disconnect A2DP device, check it's not listed in dumpsys media.audio_policy
Change-Id: Ic5f9387194d92a7a050e7a295a13a9ae18cd96ce

Report ION pools, ION mapped and unmapped heap sizes. Account ION pools
as kernel reclaimable memory which removes them from the "Lost RAM"
category.

Bug: 138148041
Test: dumpsys meminfo
Change-Id: Ica3e1c3f73656b1b937f2fc58c18e0157e02bf57
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

KReclaimable field from /proc/meminfo is designed to represent total amount
of memory that kernel can reclaim when needed. This includes reclaimable
memory consumed by slab and reported in SReclaimable field as well as ION
pools. By using KReclaimable instead of SReclaimable we will account for
ION pools currently reported under "Lost RAM" category in dumpsys meminfo
report.

Bug: 138148041
Test: dumpsys meminfo
Change-Id: Ifdea234d05639db93074ab598b81db5ff5b43612
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Provide means for system_server to query ION memory usage. The new API
allows to get total size of ION heaps, pools and part of ION heaps that
is mapped into user space.

Bug: 138148041
Test: dumpsys meminfo
Change-Id: I6d76d534bbab5ee1646e8e3e3fe5210dcf76bc23
Merged-In: I6d76d534bbab5ee1646e8e3e3fe5210dcf76bc23
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Extract a simple wrapper around ArrayMap called "ArrayMapWithHistory",
with associated tests. TimeDetectorStrategyImpl and
TimeZoneDetectorStrategy were duplicating some data structure logic.

ArrayMapWithHistory works the same as ArrayMap, but there is a (mostly
hidden) history of the values for each map entry. This is useful for
debugging.

A second class, ReferenceWithHistory, has been included to support the
ArrayMapWithHistory class and for use when extending the time / time
zone detector strategy implementations: this will be useful as
additional sources like GNSS / NTP are added to time detector, and
geo-location are added to time zone detection.

Bug: 146563025
Bug: 140712361
Test: atest com.android.server.timedetector
Test: atest com.android.server.timezonedetector
Change-Id: Ia6195cb628679a6a32c0118d2921e699514eed7d

Bug: 135956699
Test: Manual
Change-Id: Ib12ff430c5781044ec0b36ac9b930224fc410c95
(cherry picked from commit 49b3b168)
Merged-in: Ib12ff430c5781044ec0b36ac9b930224fc410c95

Test: build
Change-Id: Ia17176fc4bfd099db5faad2b5f9b9d99a3407d2d

If device doesn't support userspace reboot then call to
PowerManager.reboot("userspace") will throw an
UnsupportedOperationException.

For the case of upgrading devices, Treble enforces that previous vendor
image should work with the new system image. Since userspace reboot
requires services to be stopped and restarted cleanly, which upgrading
devices might not be able to comply with, we need to have an API to
distinguish between devices that support userspace reboot and the ones
that do not.

Test: atest PowerManagerTest
Test: atest CtsUserspaceRebootHostSideTestCases
Bug: 138605273
Bug: 135984674
Change-Id: I8303f43ab29499eb2995f0256854c787055d9560

Test: treehugger
Change-Id: I61366a576e75137cef2b6607cd860cfd16c23869

This reverts commit a5264903.

Reason for revert: Droidcop-triggered revert due to breakage https://android-build.googleplex.com/builds/quarterdeck?branch=git_master&target=sdk_phone_armv7-sdk&lkgb=6083299&lkbb=6085371&fkbb=6083313, bug b/146533269

Change-Id: Ie5b031d7b277cf0e09b0a9776b26bf74f5f69e70

on go device when try to get timestamp, the value over-followed sometimes
as a result, GtsIncidentManagerTestCases would fail due to a negative timestamp

Bug: 142513252
Change-Id: I7d5e701bb8bf4e788a718e093681f97b95cb8551

".apex" is easy to confuse.
Rename as below:
apex: com.android.tethering.apex -> com.android.tethering
apk: com.android.tethering -> com.android.networkstack.tethering

Bug: 146471733
Test: build

Change-Id: I2c7647abb996539a3af6cfe0e0214a5e8927c0d6
Merged-In: I2c7647abb996539a3af6cfe0e0214a5e8927c0d6

The module framework is now a build-only library whose purpose is to
provide hidden APIs from the non-updatable part of the platform and APIs
from the modules. Merging updatable_media_stub to framework, like the
stub libraries from other modules.

Bug: N/A
Test: m

Exempt-From-Owner-Approval: cherry-pick from internal

Merged-In: Ib627523aab44b7c41d27d70c6ae34cda5dc2e27c
(cherry picked from commit 92721349)
Change-Id: Ib627523aab44b7c41d27d70c6ae34cda5dc2e27c