[DeviceService] Add service tests for VibrationManager.

device/vibration/android/BUILD.gn

Index: device/vibration/android/BUILD.gn
diff --git a/device/vibration/android/BUILD.gn b/device/vibration/android/BUILD.gn
index 3833b18b254edad7b1d120fb0db5cfbf9c5530a0..5b3ae0a0a3388c65f16e1b8087b5352449c909b1 100644
--- a/device/vibration/android/BUILD.gn
+++ b/device/vibration/android/BUILD.gn
@@ -5,6 +5,13 @@
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
+generate_jni("vibration_jni_headers") {
+  sources = [
+    "java/src/org/chromium/device/vibration/VibrationManagerImpl.java",
+  ]
+  jni_package = "vibration"
+}
+
 android_library("vibration_manager_java") {
   java_files =
       [ "java/src/org/chromium/device/vibration/VibrationManagerImpl.java" ]