[DO NOT MERGE]

API level 30 upgrade: AOSP/Launcher3

The AndroidManifest.xml file of the AOSP Launcher3 app
has been upgraded so that its targetSdkVersion is 30.

Test: manual - after the change, the app built, intialized,
and ran successfully with the UI features functioning
properly. One unit test failed although this same test failed
before the upgrade so this can be addressed later. It may be
an error with the test itself. CTS provider tests were also
run and the output can be seen below:

================= Results ==================
=============== Consumed Time ==============
    arm64-v8a CtsProviderTestCases: 18m 34s
Total aggregated tests run time: 18m 34s
============== TOP 1 Slow Modules ==============
    arm64-v8a CtsProviderTestCases: 0.34 tests/sec [376 tests / 1114253 msec]
============== Modules Preparation Times ==============
    arm64-v8a CtsProviderTestCases => prep = 9748 ms || clean = 3385 ms
Total preparation time: 9s  ||  Total tear down time: 3s
=======================================================
=============== Summary ===============
Total Run time: 20m 17s
1/1 modules completed
Total Tests       : 376
PASSED            : 362
FAILED            : 0
IGNORED           : 6
ASSUMPTION_FAILURE: 8
============== End of Results ==============

Change-Id: I1121ded221fbbb90534fae706e12d007bce2bb5a
Merged-In: Ie476f8cbe56bf51218b15b8361a22fec2dc845e6