audio: add calculateBufferSizeFrames for vendor implementation.

In case of encoded format, the buffer size might be varied due to
vendor implementation. Adding virtual calculateBufferSizeFrames()
so that vendor can override it if necessary.

Bug: 383082824
Test: atest VtsHalAudioCoreTargetTest
Change-Id: Ica146990ce475ddd0183eab7e415277d0a4de270
2 files changed