Add manifest API to request a large heap.

You can now do android:largeHeap="true" on an application.

Doesn't yet do anything, waiting for Dalvik API.

Also tweak package parsing so that the SDK API level is set in the
configuration, allowing manifest resource value selection based on
that.

Change-Id: I6e035f9702a97b055416743b88f83a22ba4a9584
10 files changed