Migrate ShortcutHelper from Activity to BottomSheet Dialog.

Fix: 362742276
Fix: 368284741
Fix: 362736342
Fix: 362733890
Fix: 356842463
Fix: 362730288
Fix: 358560966
Fix: 372659372
Test: ShortcutHelperActivityStarterTest
Flag: com.android.systemui.keyboard_shortcut_helper_rewrite
Change-Id: I53c7af2959ecb9a379d9efb548e47f6566b8d06d
13 files changed