Revert^2 "Remove implict jni.h include path""

This reverts commit 2a1d42e4.

Reason for revert: Changes landed to projects that broke in post-submit (http://ag/11570610, http://ag/11571511).

Bug: 152482542
Test: m checkbuild

Change-Id: I6175d7c59734ba9b6c32457e5a9b0704d49f4106