Pause notify quick settings tiles change until

AccessibilityManagerService finish initialize the user

Bug: 392560794
Test: manual add thread sleep for 10 seconds in switch user and verify
if the ReadingMode tile would persist when reboot
Test: atest
Flag: com.android.server.accessibility.notify_qs_tile_changed_after_user_initialization

Change-Id: I2d01b50e0575f5f28bb264c42048e14de57396e8