Move VP9 Encoder parameters to the end of the enum

Addressing comment on http://ag/867042

https://googleplex-android-review.git.corp.google.com/#/c/867042/2/include/media/openmax/OMX_IndexExt.h@79

Change-Id: Idec839f62609e659c4de5c9c8de94ecb88a82421
diff --git a/include/media/openmax/OMX_IndexExt.h b/include/media/openmax/OMX_IndexExt.h
index 63fbff8..d0ae867 100644
--- a/include/media/openmax/OMX_IndexExt.h
+++ b/include/media/openmax/OMX_IndexExt.h
@@ -76,14 +76,14 @@
     OMX_IndexConfigVideoVp8ReferenceFrame,          /**< reference: OMX_VIDEO_VP8REFERENCEFRAMETYPE */
     OMX_IndexConfigVideoVp8ReferenceFrameType,      /**< reference: OMX_VIDEO_VP8REFERENCEFRAMEINFOTYPE */
     OMX_IndexParamVideoAndroidVp8Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP8ENCODERTYPE */
-    OMX_IndexParamVideoVp9,                         /**< reference: OMX_VIDEO_PARAM_VP9TYPE */
-    OMX_IndexParamVideoAndroidVp9Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP9ENCODERTYPE */
     OMX_IndexParamVideoHevc,                        /**< reference: OMX_VIDEO_PARAM_HEVCTYPE */
     OMX_IndexParamSliceSegments,                    /**< reference: OMX_VIDEO_SLICESEGMENTSTYPE */
     OMX_IndexConfigAndroidIntraRefresh,             /**< reference: OMX_VIDEO_CONFIG_ANDROID_INTRAREFRESHTYPE */
     OMX_IndexParamAndroidVideoTemporalLayering,     /**< reference: OMX_VIDEO_PARAM_ANDROID_TEMPORALLAYERINGTYPE */
     OMX_IndexConfigAndroidVideoTemporalLayering,    /**< reference: OMX_VIDEO_CONFIG_ANDROID_TEMPORALLAYERINGTYPE */
     OMX_IndexParamMaxFrameDurationForBitrateControl,/**< reference: OMX_PARAM_U32TYPE */
+    OMX_IndexParamVideoVp9,                         /**< reference: OMX_VIDEO_PARAM_VP9TYPE */
+    OMX_IndexParamVideoAndroidVp9Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP9ENCODERTYPE */
     OMX_IndexExtVideoEndUnused,
 
     /* Image & Video common configurations */