Merge branch 'bugfix/a2dp_sink_fluent' into 'master'

component/bt : enlarge the A2DP SINK FRAME QUEUE SIZE to make A2DP more fluent

See merge request idf/esp-idf!2492

components/bt/bluedroid/btc/profile/std/a2dp/btc_a2dp_sink.c

@@ -87,8 +87,8 @@ enum {
    but due to link flow control or thread preemption in lower
    layers we might need to temporarily buffer up data */
 
-/* 5 frames is equivalent to 6.89*5*2.9 ~= 100 ms @ 44.1 khz, 20 ms mediatick */
-#define MAX_OUTPUT_A2DP_SNK_FRAME_QUEUE_SZ     (5)
+/* 18 frames is equivalent to 6.89*18*2.9 ~= 360 ms @ 44.1 khz, 20 ms mediatick */
+#define MAX_OUTPUT_A2DP_SNK_FRAME_QUEUE_SZ     (18)
 
 typedef struct {
     UINT16 num_frames_to_be_processed;