media: Add new OMX extension for setting latency.

Test: Video Recording
Bug: 34221970
Change-Id: I525d86358f3f25a04ae0ac1a80461f8414e5a163
diff --git a/include/media/openmax/OMX_IndexExt.h b/include/media/openmax/OMX_IndexExt.h
index d0ae867..0acbf7f 100644
--- a/include/media/openmax/OMX_IndexExt.h
+++ b/include/media/openmax/OMX_IndexExt.h
@@ -95,6 +95,7 @@
     OMX_IndexConfigPriority,                        /**< reference: OMX_PARAM_U32TYPE */
     OMX_IndexConfigOperatingRate,                   /**< reference: OMX_PARAM_U32TYPE in Q16 format for video and in Hz for audio */
     OMX_IndexParamConsumerUsageBits,                /**< reference: OMX_PARAM_U32TYPE */
+    OMX_IndexConfigLatency,                         /**< reference: OMX_PARAM_U32TYPE */
     OMX_IndexExtOtherEndUnused,
 
     /* Time configurations */