Use routed devices throughout the audio framework

After you open an audio stream, you can call getRoutedDevice() to
get which output device is actually used.

However, if you play an ALARM with a headset attached, audio comes
out of both the speaker and the headset. This is not properly reflected
with our current APIs.

Throughout the audio framework, we should use DeviceIdVector instead
of a single device when getRoutedDevice(s) are called.

This change touches many files because onAudioDeviceUpdate() has many
callers.

BYPASS_LARGE_CHANGE_WARNING

Bug: 367816690
Test: atest AAudioTests
Test: atest audiorecord_tests
Test: atest audiosystem_tests
Test: atest audiotrack_tests
Test: adb shell /data/fuzz/arm64/libaaudio_fuzzer/libaaudio_fuzzer
Test: adb shell /data/fuzz/arm64/mediaplayer_fuzzer/mediaplayer_fuzzer
Test: adb shell /data/fuzz/arm64/mediarecorder_fuzzer/mediarecorder_fuzzer
Test: OboeTester Test Output with Alarm and USB
Flag: EXEMPT refactor
Change-Id: I5e32ac5d1c24229e60112ef00d82af41d8eff6e7