[MQ API feedback] Improve ambient backlight APIs

1. make AmbientBacklightCallback an interface
2. rename getCompressAlgorithm to getCompressionAlgorithm
3. move compression algorithm constants
4. rename getHorizontalZonesNumber and getZonesColors
5. rename AMBIENT_BACKLIGHT_EVENT_METADATA

Bug: 382041326
Test: mmm
Flag: android.media.tv.flags.media_quality_fw
API-Coverage-Bug: 378154044
Change-Id: Ib9d54801c36934007b24e43495fb392028ec5eaa