The current implementation of MdnsAdvertiser doesn't support updating an
existing registration. For an update request, the client needs to
unregister it first, which will trigger an exit message and then
register again, which will trigger an announcement message. There are
some clients that don't want to trigger the exit and announcement
message every time. This CL adds the API to support that use case.

Bug: 309372239
Test: TH
Change-Id: Iabe69a987a11104090082e01969e7595f05504e8

This reverts commit db884c9a.

Reason for revert: reason of aosp/2849874 revert is solved by aosp/2854408

Change-Id: Ic5ffddf2f811c0d2c359f292c3b44b833bae5eaa

This reverts commit 1e7c4a49.

This change is a suspect for causing test breakages, it may or may not be reverted.

Bug: 314087796

Reason for revert: 314087796

Change-Id: If0a1c1e2d0e260319cf64b2d00828638abebb7fe

aosp/2792436 updated NetworkAgent and NetworkAgentTest.
But the NetworkAgent change was not compatible with the old
NetworkAgentTest.
This CL makes NetworkAgent change to compatible with the old
NetworkAgentTest.

aosp/2851330 will update NetworkAgentTest to support NetworkAgent change
done in aosp/2792436.
Once the old cts is EOL, workaround in NetworkAgentTest and NetworkAgent
can be removed.

Bug: 310124646
Test: atest NetworkAgentTest
Change-Id: Ic99b0ab72526a9ba22653f5bb132214ef0814440

This reverts commit 11eac8e1.

Reason for revert: there are devices in the field using usbX interfaces for tethering

Change-Id: I7bbcbb703294de1c9dd3e0390bc8ad28aa350ef6

Check if the bpf loader rc file is differs from the template files when
ConnectivityService starts. Use Log.wtf() to log the file if there is a
diff.

Bug: 312638861
Test: TH
Change-Id: I0b9ed9962ad0954a051a17b01357d04a0e655ff4

Update registerOffloadEngine() permission check to check the
DEVICE_POWER permission in U. This change is required to allow the
android TV device to access the API in U because the
REGISTER_NSD_OFFLOAD_ENGINE permission can not be backported.

Bug: 313546516
Test: TH
Change-Id: I84b80d102a34487ad54719a86eb525b319e2fd8b

Previously the calculation of the expected ADD_TIME implicitly depended
on the default timezone of the test device and thus might have
different values and cause test failures. This fix updates the test to
always use "GMT" to generate the ADD_TIME

Bug: 308011229
Test: StructXfrmLifetimeCurTest passing with default timezone being
      GMT, GMT-6, GMT-10
Change-Id: Ib88a253c1ecb09feeb298a04b847c4105651a710

* changes:
  [XFRM_MSG_NEWSA] Support xfrm_lifetime_cfg and xfrm_lifetime_cur
  [XFRM_MSG_NEWSA] Support xfrm_selector and xfrm_id

These APIs were released via SDK extension but they need to have
FlaggedAPI annotation to avoid being released by quarterly release.

Note that this CL does not contain udc-extended-api change.
Once com.android.net.flags.register_nsd_offload_engine_api is marked as
released API, APIs with this annotations should be visible in
udc-mainline-prod API .txt files.

Bug: 301713539
Test: TH
Change-Id: I32b58ec64c1f599f48bc89b189ed24ac1717a1d7

In PrivateDnsConfig class, `useTls` is replaced with `mode`.
This CL a corresponding change.

Bug: 240259333
Test: atest ConnectivityCoverageTests
Change-Id: I60c53e52f287fc7fa05543603a62632d934bb2e6

Vpn.Dependencies contains methods used for legacy VPNs that are
now unused. Remove them.

Bug: 161776767
Test: atest FrameworksNetTests
Change-Id: I68bbb3e519f5558f9006f680df79ae8073e196cd

Change the component number to 685852 which is used for IpSec. and also
add OWNER file for xfrm unit test folder.

Test: TH
Change-Id: I2359d6d8c6b3916ce36fdbcc1f487896efb0dccb

Debugging the SIGABRT of this function is annoying because the module
can be built from source or pre-built. It requires finding the correct
version of the symbol to get the correct line number. In addition, there
are 7 consecutive aborts in source code, it is hard to tell whether the
symbolized call stack shows the right line number or not. Adds error
trace before abort so we can identify the root cause without even
symbolizing the call stack of SIGABRT.

Bug: 312094533
Test: make; flash; adb logcat
Change-Id: I74713029d059e10bf5d34694cdb96712bc806696

Bug: 308011229
Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink
      (new tests added)
Change-Id: Ibd38e3c0036c760f6397910162054cfb02e45059

Bug: 308011229
Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink
      (new tests added)
Change-Id: I0e9f52aad8e9cb72b8bbac1f9ee9f8e53d939e47

Bug: 308011229
Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink
      (new tests added)
Change-Id: I42e423c09ffb733a809636360468c963c7864872

A screenshot of the demo app:
![](https://screenshot.googleplex.com/AsiYKPzG4nJpr6x.png)

Bug: 273227725
Change-Id: I8d9bcf00bb54d3f152c436b56df919d967c5b71b

The code currently calls RandomInt twice to generate an address.
For example, if you want to generate the address 192.168.A.B,
RandomInt will be called twice to generate the values for A and B.
To save resources, we can avoid calling RandomInt twice by reusing
the same random value with different masks for A and B.
Before:
  -  RandomInt() & 0xff00 -> A
  -  RandomInt() & 0x00ff -> B
After:
  -  RandomInt() & 0xffff -> A.B

Bug: 312647670
Test: atest TetheringTests
Change-Id: Iee49af3d82781309f78fe66ab07937b8137fa259