vendor: speed up boot process

Summary:
- Disable virtual memory randomization
- Disable dalvik dexopt verification
- Disable extended JNI checks
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D537

Conflicts:
	prebuilt/common/etc/init.cfx.rc

Change-Id: Ie36250171d234018961282f851513eab2f035213