AudioFlinger: move fast path components to library

Test: compiles, oboetester
Test: atest AudioTrackTest AudioRecordTest
Bug: 284061821
Merged-In: I200eb658c4eb3d2ce2224612044ec051f3b712d2
Change-Id: I200eb658c4eb3d2ce2224612044ec051f3b712d2
27 files changed