Add jni_headers to libframeworks_coretests_jni

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

Bug: 152482542
Test: m checkbuild
Change-Id: Ie6815286723cddae1765625a1455ef8847105df8
Merged-In: Ie6815286723cddae1765625a1455ef8847105df8
(cherry picked from commit 8046836bda)

core/tests/coretests/apks/install_jni_lib/Android.bp

@@ -24,4 +24,5 @@ cc_test_library {
         "-Wall",
         "-Werror",
     ],
+    header_libs: ["jni_headers"]
 }