Fix codec output format for conversion

Pcm encoding for conversion is wrong so that conversion
does not work as intended.
This CL is fix to use pcm encoding for codec output
properly.

Bug: 116251193
Test: Check format after conversion
Change-Id: I9be62c05d3f25d769c81b200fd229f6943cd234b
diff --git a/media/libstagefright/ACodec.cpp b/media/libstagefright/ACodec.cpp
index 7f39d10..ead05a3 100644
--- a/media/libstagefright/ACodec.cpp
+++ b/media/libstagefright/ACodec.cpp
@@ -5383,7 +5383,7 @@
         AudioEncoding pcmEncoding = kAudioEncodingPcm16bit;
         (void)mConfigFormat->findInt32("pcm-encoding", (int32_t*)&pcmEncoding);
         AudioEncoding codecPcmEncoding = kAudioEncodingPcm16bit;
-        (void)mOutputFormat->findInt32("pcm-encoding", (int32_t*)&pcmEncoding);
+        (void)mOutputFormat->findInt32("pcm-encoding", (int32_t*)&codecPcmEncoding);
 
         mConverter[kPortIndexOutput] = AudioConverter::Create(codecPcmEncoding, pcmEncoding);
         if (mConverter[kPortIndexOutput] != NULL) {