Merge "[framework] Add Unknown error code and java doc for subscriptionId."...

Merge "[framework] Add Unknown error code and java doc for subscriptionId." into main am: df90f3b7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3391144



Change-Id: If0c215baecd19b0e2533fccfc195e57427eddff4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>