Add explicit dependencies on jni_headers

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

Bug: 152482542
Test: lunch aosp_x86_64 && m checkbuild
Change-Id: Ib36e679819a3309ccbf12fd592309b16c8bbd6c8

native/dicttoolkit/Android.bp

@@ -37,6 +37,7 @@ cc_defaults {
         "-Wno-unused-function",
     ],
 
+    header_libs: ["jni_headers"],
     local_include_dirs: ["src"],
     // TODO
     include_dirs: ["packages/inputmethods/LatinIME/native/jni/src"],

native/jni/Android.bp

@@ -130,6 +130,7 @@ cc_library {
         "-Wno-unused-parameter",
         "-Wno-unused-function",
     ],
+    header_libs: ["jni_headers"],
     local_include_dirs: ["src"],
 
     srcs: [
@@ -167,6 +168,7 @@ cc_library_static {
         "-Wall",
         "-Werror",
     ],
+    header_libs: ["jni_headers"],
     local_include_dirs: ["src"],
     sdk_version: "14",
     stl: "libc++_static",