RecordBufferConverter: Release converter buffer after conversion

Required to ensure the RecordThread understands the true
number of frames consumed / available.  Otherwise the RecordThread
thinks there are more frames than actually present, causing
a buffer provider underrun in the AudioResampler and the
resampler to reset.

Test: BT phone call, Tee sink
Bug: 130419319
Change-Id: I96fac6f52233e8519c0cc098329e5b9b89c1dd89

Author: xt0032rus

media/libaudioprocessing/RecordBufferConverter.cpp

@@ -117,6 +117,11 @@ size_t RecordBufferConverter::convert(void *dst,
         // format convert to destination buffer
         convertResampler(dst, mBuf, frames);
     }
+    // Release unused frames in the InputConverterProvider buffer so that
+    // the RecordThread is able to properly account for consumed frames.
+    if (mInputConverterProvider != nullptr) {
+        mInputConverterProvider->reset();
+    }
     return frames;
 }