Allow remote views to be used in Tiles

If a suggeested action Tile has a remote view defined, inflate a card
layout to contain the remote view, instead of showing the default
title-summary layout.

Additionally, if the remote view has a view with ID
@android:id/primary, that will be used as the click target rather
than the entire card.

Test: cd tests/robotests && mma
Bug: 35668836
Change-Id: I0fd1b9c637b6d7a3d7d2f6268669917408a882eb