C2SoftAacDec: Fix reset while codec's stop()

Bug: 147348711
Test: atest android.mediav2.cts.CodecDecoderTest
Test: atest android.mediav2.cts.CodecDecoderSurfaceTest

Change-Id: I61b9cf8ed61fc3cd02068cdc696ba24e30d1ca3c
1 file changed