Add API in AppWidgetServiceImpl

A new function is created to notify the service of inheritance
information of the widget provider.

Test: N/A
Bug: 221890505
Change-Id: I5f43f8d6ecd66b54869bef58898b1d3809b43d9e
(cherry picked from commit 0b51675e)
Merged-In: I5f43f8d6ecd66b54869bef58898b1d3809b43d9e