Always fill max buffers when setting format.

BUG: b/33011932
TEST: failing CTS test is now passing
Change-Id: I3ac961c83ec3e49c1d2e7aeb44ad09c5a2e049ca
diff --git a/modules/camera/3_4/v4l2_wrapper.cpp b/modules/camera/3_4/v4l2_wrapper.cpp
index 24a6faf..fd4f169 100644
--- a/modules/camera/3_4/v4l2_wrapper.cpp
+++ b/modules/camera/3_4/v4l2_wrapper.cpp
@@ -453,6 +453,7 @@
   StreamFormat desired_format(stream);
   if (format_ && desired_format == *format_) {
     HAL_LOGV("Already in correct format, skipping format setting.");
+    *result_max_buffers = buffers_.size();
     return 0;
   }