Bring back sepolicy

This reverts commit 0f4005f875534b9880d61c4e0a0668f787b2812a.
sepolicy: kickstart_checker is gone, adapt to updated kickstart init

Change-Id: Ifee151f56f59d7a664814814a2bd161a1e8a2260
Initial support for the hardware tunables framework

Change-Id: Ibb4a8049eb25f9d111d474c5015e9dd38514268b