Implemented GoogleMainSearchController to customize menu to GoogleDialer.

This change doesn't implement any of the menu actinos, it just abstracts some
components so that the GoogleDialer toolbar menu can show help and feedback
(and thus, AOSP won't).

Bug: 72526274
Test: implemented
PiperOrigin-RevId: 185033936
Change-Id: I30f8cde6705145ef95efcfc82973a8aa2b16e4ee