Stops hiding a11y services with the same package+label as an activity.

Bug: 353700779
Test: atest AccessibilitySettings, ensure new test passes
Test: revert AccessibilitySettings.java change, ensure new test fails
Test: Install poc APKs from the bug, observe issue not reproducible
Flag: NONE security fix
Change-Id: Ie680e80169aa734f2559fe50ef06e4d1eae46779