Refines the animated image to fit the screen display.

Root cause:
The width and height of animated image are wrap_content. It causes the gif or drawable which are non-transparent background to have a little weird display under dark mode.

Next:
1. Revise the width from wrap_content to match_parent, and add the fit center scale type.
2. Correct the function usage

Bug: 155946967
Test: manual test
Change-Id: I7470efb945a2b3bedb695e1b6f34475c6f190f9d

src/com/android/settings/accessibility/AnimatedImagePreference.java

@@ -60,7 +60,7 @@ public class AnimatedImagePreference extends Preference {
         }
 
         if (mMaxHeight > -1) {
-            imageView.setMaxWidth(mMaxHeight);
+            imageView.setMaxHeight(mMaxHeight);
         }
     }