Add jni_headers dependency to libsmartcamera_jni

Preparation for removing implicit include paths for jni.h from soong.

Bug: 152482542
Test: m checkbuild
Change-Id: Ibbbedfd18e574c7e668bc658d24bae5139de5cec
Merged-In: Ibbbedfd18e574c7e668bc658d24bae5139de5cec
(cherry picked from commit 39388baa)