Fine tune some UI stuff.

1. Use no animation between camera / review mode. Thus, we must have same
   layout for three types of control panel.

2. Since we have better algorithm to calculate the preview size. Let the
   gripper be the same in mdpi and hdpi devices.

3. Keep some border on the right size of image view. Otherwise, it looks
   odds in HVGA devices.

Change-Id: I65b13222cace230f09e6b33f311fd2b79758e93e
6 files changed