mm-camera: change non-HDR frame rate to variable

Improves video recording in low-light conditions.

Bug: 7292907
Change-Id: Ibd385c3f4cfc577c38794d9689f450e9b1998ed0
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/camera/QCameraHWI.cpp b/camera/QCameraHWI.cpp
index c3f6136..c2911f5 100644
--- a/camera/QCameraHWI.cpp
+++ b/camera/QCameraHWI.cpp
@@ -1053,7 +1053,7 @@
         ALOGE("%s:Setting non-ZSL mode",__func__);
         mParameters.set(QCameraParameters::KEY_CAMERA_MODE, 0);
         myMode = (camera_mode_t)(myMode & ~CAMERA_ZSL_MODE);
-        mParameters.setPreviewFrameRateMode("frame-rate-fixed");
+        mParameters.setPreviewFrameRateMode("frame-rate-auto");
         setPreviewFrameRateMode(mParameters);
      } else {
         ALOGE("%s:Setting ZSL mode",__func__);