DO NOT MERGE Use support toolbar in editor to fix issues in LMP

ContactEditorActivity has to switch to AppCompatActivity, and so
does its theme.
Use support AlertDialog in editor created dialogs so it uses the
appcompat theme correctly.

Test: Manually verified look and functionality of the toolbar in
LMP and on MNC.
Verified LMP cut/copy/paste toolbar appears over the toolbar instead
of pushing it down.

Bug: 33662452
Bug: 33587478
Change-Id: Ie6f4555a237b7a10877dd0b32615120b6d789646