API level 30 upgrade: AOSP/Music

The AndroidManifest.xml files of both the Java
and Kotlin version of the AOSP Music app have
had their targetSDKversions upgraded to level 30.
For now, the Java version of the app will be kept
so that it can be showcased for Bazel conversion.

Test: manual - after the changes, both Music and
MusicKotlin built successfully. Moreovoer, mp3 files
were pushed onto the phone and played using the Music
and MusicKotlin apps without issues. CTSProviderTests
were also run and the output can be seen below:

================= Results ==================
=============== Consumed Time ==============
    arm64-v8a CtsProviderTestCases: 11m 31s
Total aggregated tests run time: 11m 31s
============== TOP 1 Slow Modules ==============
    arm64-v8a CtsProviderTestCases: 0.54 tests/sec [376 tests / 691227 msec]
============== Modules Preparation Times ==============
    arm64-v8a CtsProviderTestCases => prep = 9081 ms || clean = 2422 ms
Total preparation time: 9s  ||  Total tear down time: 2s
=======================================================
=============== Summary ===============
Total Run time: 13m 11s
1/1 modules completed
Total Tests       : 376
PASSED            : 362
FAILED            : 0
IGNORED           : 6
ASSUMPTION_FAILURE: 8
============== End of Results ==============

Change-Id: I2415a5d4fd3029698d48b24ae6e142edcbf4e373
2 files changed