RESTRICT AUTOMERGE Remove flag check to sanitise keyboard shortcuts provided by apps.

Flag has been rolled out.

Bug: 331180422
Flag: EXEMPT removing com.android.systemui.validate_keyboard_shortcut_helper_icon_uri
Test: Manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e1bee47e162d62984dd5f21686fed1cff19f6c21)
Merged-In: Iaca90a21f6337cdf7b149cf11aa7656cfb3bada4
Change-Id: Iaca90a21f6337cdf7b149cf11aa7656cfb3bada4