android: fix makefile to build on AOSP

relative path seems could be buggy on aosp,
also some remains in include could make problems.

Change-Id: I4fcbf1bb8d7588d670e2fc5f8beb71397175c8bb
android: fix simple path for cm, add note for later

current AOSP (master) seems a bit different regarding
the variable $(TARGET_OUT_INTERMEDIATES)

Change-Id: I4a92743124950fadffcbff2b88f455db09a45d9e
Android.mk: toggle l-preview config flag
Revert "android: fix simple path for cm, add note for later"

This reverts commit 266892e6b300085e3220e180f303280ef1f5745c.