feat(EvenDimmer): Add popup for removing accessibility shortcuts

We do the following changes to show a popup for helping users to
deprecate Extra Dim shortcuts:
1. Send ACTION_LAUNCH_EXTRA_DIM_DIALOG when the Extra Dim shortcuts are
   triggered on the devices with EvenDimmer
2. The ACTION is received in SystemUI
3. Show popup for removing Extra Dim shortcuts(Dismiss keyguard if
   needed)
4. Remove all potential Extra Dim shortcuts when users click on the
   "Remove Extra Dim shortcut" button
5. Show the instructions with a toast after removing the shortcuts

Bug: 349458355
Test: atest ExtraDimDialogDelegateTest
      atest ExtraDimDialogReceiverTest
      atest ExtraDimDialogManagerTest
Flag: com.android.server.display.feature.flags.even_dimmer
Change-Id: I7fcda2ad38b780f2b83478c7170b45497cb25624