Revert "Revert "Revert "cache shourtcut image"""

This reverts commit d13f0c5c45550bffc335f47f1a0c545df68c0584.

Reason for revert: app crashes when adding widgets automatically b/141568904

Change-Id: I5b97f440716c93b1bd93c899e3e1d40e8bbd2885
6 files changed