selinux: remove dependency on libsepol static lib

runcon applet is including flask.h for constants

the only one required is SECCLASS_PROCESS (2)

Change-Id: Ia57abc21b291e7cbf81fdd031baaa5ac4436cbc8
Android: do not force the rebuild of config files

Change-Id: Ic6bc2bc7177b1f266b9c0d1ccdfb925c1aa00d46
route: remove useless ipv6 header

Change-Id: I4cb0f232be6b7060e9a1bd66b4946060911405de
Android.mk: toggle l-preview config flag

Change-Id: I4465b88a0337f5f267d501a94b2f71f8ef07b318