lvm wrapper: Set SourceFormat as per number of channels

Bug: 171585865
Test: poc in bug
Test: AudioEffectTest, AudioPreProcessingTest, BassBoostTest
Test: EnvReverbTest, EqualizerTest, LoudnessEnhancerTest
Test: PresetReverbTest, VirtualizerTest, VisualizerTest
Change-Id: I9bcf11110c0da052b6a142289570da40a6f409d1
1 file changed