Implement dark launch logic for sharesheet aiai model.

Route the sharesheet user interaction from PeopleService to Remote Prediction Service, while PeopleService is making inference for sharesheet.
It is guarded by the flag "adb shell device_config put systemui dark_launch_remote_prediction_service_enabled true"

Test: test on local device
Bug: 180933488
Change-Id: I7db52c69224e69ad3125362185e2ffd1a474bb78
Merged-In: I7db52c69224e69ad3125362185e2ffd1a474bb78
(cherry picked from commit 51daca2e)