Separate timer for availability and performance

Add res config: auto_data_switch_performance_stability_time_threshold_millis
as stability check when switch due to RAT/signal strength.

Test: adb shell am broadcast -a com.android.internal.telephony.TestServiceState --ei phone_id 1 --ei data_rat 3
Test: inspect log to confirm
Test: data browsing and voice call
Fix: 308456021

Change-Id: Ic4b870ed3679bb5b25ddc6daa014ceb1b5fa4357