Also other cleanup and fixes:
- We now properly set the default window format to 565.
- New APIs to set the window format and flags from native code.
- Tweaked glue for simpler handling of the "destroy" message.
- Um, other stuff.
Change-Id: Id7790a21a2fa9a19b91854d225324a7c1e7c6ade
Not yet hooked up to anything in the NDK, but requires renaming
the existing android_native_window_t type everywhere.
Change-Id: Iffee6ea39c93b8b34e20fb69e4d2c7c837e5ea2e