Add dependencies on jni_headers

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

Bug: 152482542
Test: m checkbuild
Change-Id: I54806e51f2d1715ef1c18b0103a8ec5f6b7a540d
Merged-In: I54806e51f2d1715ef1c18b0103a8ec5f6b7a540d
Exempt-From-Owner-Approval: build clean-up
diff --git a/Android.bp b/Android.bp
index 52599a7..7683387 100644
--- a/Android.bp
+++ b/Android.bp
@@ -290,6 +290,7 @@
     ],
 
     static_libs: ["libgmock"],
+    header_libs: ["jni_headers"],
 
     multilib: {
         lib32: {