1. Mark @hide for "Drawable loadAnimatedImage(Context)" and "String loadHtmlDescription(PackageManager)".
2. Move common function into util.
Bug: 149516547
Bug: 142532186
Test: maunal test
Change-Id: I4f734a496938f64bcde990268e11a2d1a5be4771
Merged-In: I4f734a496938f64bcde990268e11a2d1a5be4771
(cherry picked from commit a2f7f84938)