Update bitrate modes for opus encoder in media_codecs_sw.xml

Supported Bitrate mode was wrongly listed as CQ

Test: Build, flash verify media_codecs.xml on device
Bug: 133260064
Change-Id: I974f18f9303cff063bcadc71e1ecb10fc6bcfce3

media/libstagefright/data/media_codecs_google_c2_audio.xml

@@ -112,7 +112,7 @@
             <Limit name="sample-rate" ranges="8000,12000,16000,24000,48000" />
             <Limit name="bitrate" range="500-512000" />
             <Limit name="complexity" range="0-10"  default="5" />
-            <Feature name="bitrate-modes" value="CQ" />
+            <Feature name="bitrate-modes" value="CBR" />
         </MediaCodec>
     </Encoders>
 </Included>

media/libstagefright/data/media_codecs_sw.xml

@@ -237,7 +237,7 @@
             <Limit name="sample-rate" ranges="8000,12000,16000,24000,48000" />
             <Limit name="bitrate" range="500-512000" />
             <Limit name="complexity" range="0-10"  default="5" />
-            <Feature name="bitrate-modes" value="CQ" />
+            <Feature name="bitrate-modes" value="CBR" />
         </MediaCodec>
         <MediaCodec name="c2.android.h263.encoder" type="video/3gpp">
             <Alias name="OMX.google.h263.encoder" />