Implement libAudioHal AIDL EffectsFactoryHalInterface getProcessings

Bug: 281572768
Test: atest EffectsFactoryHalInterfaceTest
Test: atest --test-mapping hardware/interfaces/audio/aidl/vts:presubmit
Change-Id: I97484647ef55cbe08e6edd82663615c02a043823
Merged-In: I97484647ef55cbe08e6edd82663615c02a043823
5 files changed