Add config for auto data switch switch back case

When both phones are OOS, allow longer lingering time to maximize user's change of accessing internet.

Bug: 393553449
Test: manual repro + reviewed log
Test: basic voice call + data browsing
Flag: Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e50bf8947081bf629ea90b8fe66a2e6a85275f93)
Merged-In: I7de3aa38ba78dbd6e7a7931d7e03e343e51baa21
Change-Id: I7de3aa38ba78dbd6e7a7931d7e03e343e51baa21