Merge "Write default accessibility service only when user enter into...

Merge "Write default accessibility service only when user enter into corresponding page." into tm-dev am: 7a5ade7e am: 89e58480 am: 789263e6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17655026



Change-Id: I174992eca77c10079a18d3887825648c29b8b8bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>