msm8974: Move dalvik heap & hwui memory config to devices

Change-Id: I1f29ea4088ba3a3d0c5d01c425c77c4d8de7ce5f
msm8974: Move aapt config to devices

Change-Id: Ia205ce3e7ccf7b24bbe965f3994dfd3d88428002
msm8974: Remove redundant CFLAGS

* These are set in qcom_target.mk

Change-Id: Ic26f3220866573b5da578508a273796fe3ddbc21