Enable the cached service removal feature by default

The nsd_cached_services_removal flag has been successfully rolled
out to the public stage on Pixel devices and has significantly
improved the Nearby connection success rate. Consequently, this
flag should be enabled by default with a kill switch, allowing
the feature to be deployed to all production devices.

Bug: 352629221
Test: atest ConnectivityCoverageTests NsdManagerTest
Change-Id: Ib37b94d729e4d9a8da6f3e574bf149141ebe4a56
2 files changed