Clean up multiple warren_buffer flags.

wb_platform_api_improvements
wb_consumer_base_owns_bq
wb_camera3_and_processors

BYPASS_IGBP_IGBC_API_REASON=Used in a comment.

Bug: 342199002
Test: Build and run
Flag: EXEMPT flag cleanup
Change-Id: I109788d58b98147a6c88487d9e70cc0cf0948638
2 files changed