Change BridgeResources to Resources_Delegate [DO NOT MERGE]

Do not merge because the resource implementation has changed in N and
the change is no longer valid there.

This is a very hacky fix to make layoutlib work with the latest support
lib. Inject a couple of fields in android.content.res.Resources to
allow using most of the earlier code as is.

Bug: 27403642
Bug: http://b.android.com/201934
Change-Id: I186cad32b1b4de64164fbad937d989e0110c6976