Migrate tethering notification resources

Migrate the resources which are only used by tethering notification
from framework/base/core/res to tethering package resource
folder.

Bug: 122085773
Bug: 139763854
Test: build pass
Change-Id: I832103090d500fd8e2e2efb9dc7151426da3f88d
Merged-In: I832103090d500fd8e2e2efb9dc7151426da3f88d