Add explicit dependencies on jni_headers

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

Bug: 152482542
Test: m
Change-Id: Ib520114cd7df1572c3805d83d48cb903ebda4f66
diff --git a/jni/Android.bp b/jni/Android.bp
index b6971c6..b84f6cd 100644
--- a/jni/Android.bp
+++ b/jni/Android.bp
@@ -7,6 +7,7 @@
         "-Wextra",
         "-Werror",
     ],
+    header_libs: ["jni_headers"],
     sdk_version: "9",
     shared_libs: ["liblog"],
 }
diff --git a/jni_jpegstream/Android.bp b/jni_jpegstream/Android.bp
index c196782..b8adf77 100644
--- a/jni_jpegstream/Android.bp
+++ b/jni_jpegstream/Android.bp
@@ -20,6 +20,7 @@
         "-Wextra",
         "-Werror",
     ],
+    header_libs: ["jni_headers"],
     local_include_dirs: ["src"],
     sdk_version: "17",