Add additional overriding methods to signature files

This change adds overriding methods that are essential to compile the
stubs generated from the signature files.

More information and the background for this change is available at

Test: m checkapi
Bug: 299366704
(cherry picked from
Merged-In: I6445c164fb83568fabae71443e8dd5c47f8c7562
Change-Id: I6445c164fb83568fabae71443e8dd5c47f8c7562
6 files changed