Replace broadcast with adding a method in BugreportCallback

BUG: 154298410
Test: BetterBug can work normally in bug report shortcut flow
Change-Id: Ibc1a5a8ac308c303399d28eb8c177096b805fdf9
Merged-In: Ibc1a5a8ac308c303399d28eb8c177096b805fdf9
(cherry picked from commit ec91d7700d9316ba09d639ab55ce94fb72d0f8ec)
5 files changed