Update //remoting/android build templates

Use java_files instead of sources in GN build templates in
//remoting/android.

TBR=joedow@chromium.org

Bug: 1035074
Change-Id: I7786b905f26b9d9180eba01748218ad3ec2ea74c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980970Reviewed-by: Natalie Chouinard <chouinard@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727240}

remoting/android/client_java_tmpl.gni

@@ -7,8 +7,8 @@ import("//remoting/remoting_options.gni")
 
 template("remoting_android_client_java_tmpl") {
   android_library(target_name) {
-    _java_file_prefix = "//remoting/android/java/src/org/chromium/chromoting"
-    _java_files = [
+    _sources_prefix = "//remoting/android/java/src/org/chromium/chromoting"
+    _sources = [
       "ActivityLifecycleListener.java",
       "AnimationJob.java",
       "Capabilities.java",
@@ -46,6 +46,7 @@ template("remoting_android_client_java_tmpl") {
       "SizeChangedEventParameter.java",
       "SwipePinchDetector.java",
       "SystemUiVisibilityChangedEventParameter.java",
+      "TapEventParameter.java",
       "TapGestureDetector.java",
       "TermsOfServiceActivity.java",
       "ThirdPartyTokenFetcher.java",
@@ -53,7 +54,6 @@ template("remoting_android_client_java_tmpl") {
       "TouchInputHandler.java",
       "TouchInputStrategy.java",
       "TrackpadInputStrategy.java",
-      "TapEventParameter.java",
       "TwoPointsEventParameter.java",
       "WebViewActivity.java",
       "accountswitcher/AccountManagerCompat.java",
@@ -71,15 +71,15 @@ template("remoting_android_client_java_tmpl") {
       "help/HelpSingleton.java",
       "jni/Client.java",
       "jni/ConnectionListener.java",
-      "jni/GlDisplay.java",
       "jni/DirectoryService.java",
+      "jni/GlDisplay.java",
       "jni/JniInterface.java",
       "jni/JniOAuthTokenGetter.java",
       "jni/NotificationPresenter.java",
       "jni/TouchEventData.java",
     ]
 
-    java_files = rebase_path(_java_files, ".", _java_file_prefix)
+    sources = rebase_path(_sources, ".", _sources_prefix)
 
     deps = [
       "//base:base_java",