Fixed when the CompatibilityBridge is attached to an activity.

The AccessibilityManager is a singleton, so we need to update it everytime
an activity is resumed.

Test: manual verification with Chrome (CTS test is an overkill here)
Test: atest CtsAutoFillServiceTestCases # to make sure it didn't break anything

Fixes: 112690889
Change-Id: If011db203dee96ec511da80f4e49395c0340f482
(cherry picked from commit ce40498d)