Merge "[Thread] clear calling identity before invoking app-supplied callback" into main am: e903b81709

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2825973

Change-Id: I757bbdc99484ee7f84b1a2c92433923f70e6224d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>