Allow non pcm formats for setBufferSizeInFrames

For compressed formats the buffer size is actual bytes (or a frame is
considered equal to 1 byte).

Test: atest AudioTrackLatencyTest#testSetBufferSize
Test: manual test to set buffer size for an EAC3 AudioTrack
Bug: 192343963
Change-Id: Id9ba3da8e431208f38639004a47a4a27235e9d71