Add auto_data_switch_availability_stability_time_threshold to control auto...

Add auto_data_switch_availability_stability_time_threshold to control auto data switch am: 42505a8d

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2377339



Change-Id: I2f9909314bb6fe72df02ca1eb9c47ad0ea38c718
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>