migrate custom widgets in comply with plugin framework

Bug: 139888225
Change-Id: I8a3d0fe2689ad5ba24b19309728bbad0b6287f71
Merged-In: I8a3d0fe2689ad5ba24b19309728bbad0b6287f71
(cherry picked from commit c7a6c2979cc063dd493316d0d19cbc0501a23a64)
13 files changed