avcodec/mediacodecenc: set quality in cq mode

From AOSP doc, these values are device and codec specific, but lower
values generally result in more efficient (smaller-sized) encoding.

For example, global_quality 50 on Pixel 6 results a 1080P 30 FPS
HEVC with 3744 kb/s, while global_quality 80 results 28178 kb/s.

Fix #10689

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
(cherry picked from commit 287e22f745)

libavcodec/mediacodecenc.c

@@ -268,8 +268,11 @@ static av_cold int mediacodec_init(AVCodecContext *avctx)
 
     if (avctx->bit_rate)
         ff_AMediaFormat_setInt32(format, "bitrate", avctx->bit_rate);
-    if (s->bitrate_mode >= 0)
+    if (s->bitrate_mode >= 0) {
         ff_AMediaFormat_setInt32(format, "bitrate-mode", s->bitrate_mode);
+        if (s->bitrate_mode == BITRATE_MODE_CQ && avctx->global_quality > 0)
+            ff_AMediaFormat_setInt32(format, "quality", avctx->global_quality);
+    }
     // frame-rate and i-frame-interval are required to configure codec
     if (avctx->framerate.num >= avctx->framerate.den && avctx->framerate.den > 0) {
         s->fps = avctx->framerate.num / avctx->framerate.den;