Revert "Revert "Camera3: Work around for streams with different o/p rates""

This reverts commit d897e24270f74b8266a37e01a1dd2f4797b13258.

Bug: 10914356
diff --git a/camera/QCamera2/HAL3/QCamera3Channel.cpp b/camera/QCamera2/HAL3/QCamera3Channel.cpp
index 3ec5834..4837245 100755
--- a/camera/QCamera2/HAL3/QCamera3Channel.cpp
+++ b/camera/QCamera2/HAL3/QCamera3Channel.cpp
@@ -1768,7 +1768,7 @@
     return exif;
 }
 
-int QCamera3PicChannel::kMaxBuffers = 1;
+int QCamera3PicChannel::kMaxBuffers = 2;
 
 /*===========================================================================
  * FUNCTION   : QCamera3ReprocessChannel