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 39388baac9)

tests/Camera2Tests/SmartCamera/SimpleCamera/jni/Android.bp

@@ -33,5 +33,6 @@ cc_test_library {
         "-Werror",
         "-Wno-unused-parameter",
     ],
+    header_libs: ["jni_headers"],
     stl: "c++_static",
 }