set TARGET_USERIMAGES_USE_EXT4

Change-Id: I5b8c1a5f05bd0266ff5f4235d27d654813027cc1
fix overlay of frameworks

Change-Id: I7175dd14bff233769d6a44ad42ce68bb7d0991a4
remove some custom defines

Change-Id: Ie3c196dca254929f624db850be6f64b1b52a43b4