Bug: 255714762
Test: presubmit
Change-Id: If91e9af5409fed9d5ccdd13749a0f562c545d589

This commit sets up the initial Thread network service for the
Android Thread feature which allows an Android device to create
a Thread network and being a Border Router.

See https://www.threadgroup.org/What-is-Thread for background of
Thread.

See b/235016403 for the Android Thread feature request.

Test: lunch aosp_cf_x86_64_tv-userdebug
      m && launch_cvd
      atest CtsThreadNetworkTestCases
Bug: 262683651
Change-Id: Ie1bb23084531f67165ec068ea3ca39592dbc01d1

ot-daemon is a dependency of the new Thread feature. This commit
add the ot-daemon binary and init rc file to the Tethering module.
Note that the ot-daemon service is default disabled and versioned
init rc file is used to ensure that this service won't be started
before Android U.

This is expected to increase the size of "com.android.tethering.capex"
by around 400 KB.

Manual verification:
1. on Android T (33) CF device, the ot-daemon service is not started
   after device boots; It reports service not found error when trying
   to start the ot-daemon service with adb shell command "start
   ot-daemon"
2. on Android U (34) CF device, the ot-daemon service is not started
   after device boots; It can be started with shell comamnd "start
   ot-daemon" but then failed because of missing sepolicy rules as
   expected

Test: see above manual verification note
Bug: 296211911
Change-Id: I222e2bbcc2ad0be2beec9f5f3406e7144d314370

Bug: 296211911
Change-Id: Ifd4f7cd06f1aeaba739d27d2328e89031ca73235