aaudio: add support for 24 and 32 bit PCM

Add new formats: AAUDIO_FORMAT_PCM_I24_PACKED
and AAUDIO_FORMAT_PCM_I32.

Pass formats to Legacy AudioTrack and AuddioRecord.

Request 24_PACKED in AAudio Service for MMAP streams.
Also add a flowgraph module for converting the I32 data
to/from FLOAT.

Bug:  65067568
Bug: 157671580

Test: To determine which format the MMAP path is using for the DSP,
Test: adb shell dumpsys media.aaudio
Test: then look for the "Exclusive MMAP Endpoints" and "Format:".
Test: The formats listed are the internal AudioFlinger formats:
Test:    1=16_BIT, 3=32_BIT, 4=8_24_BIT, 5=FLOAT, 6=24_BIT_PACKED

Test: atest AAudioTestCases
Test: adb shell write_sine_callback -? # to list new formats
Test: adb shell write_sine_callback -pl -f3 # MMAP LOWLAT I24_PACKED
Test: adb shell write_sine_callback -pl -f4 # MMAP LOWLAT I32
Test: # Legacy LOWLAT I24_PACKED
Test: adb shell write_sine_callback -pl -f3 -m1
Test: adb shell write_sine_callback -pl -f4 -m1 # Legacy LOWLAT I32
Test: adb shell write_sine_callback -pn -f3 # Legacy I24_PACKED
Test: adb shell write_sine_callback -pn -f4 # Legacy I32
Change-Id: Ibe13bfd54425d110f50f89eb10c63872a2f99839