Replace java_files with sources in //remoting/android

Replace usages of java_files with sources in above gn files, and
automatically format.

This CL was uploaded by git cl split.

R=joedow@chromium.org

Bug: 1035074
Change-Id: I4fd20b72da6c1a8238d2b05ef237bd127fd09de7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980953
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Commit-Queue: Lambros Lambrou <lambroslambrou@chromium.org>
Auto-Submit: Natalie Chouinard <chouinard@chromium.org>
Reviewed-by: Lambros Lambrou <lambroslambrou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727212}

remoting/android/BUILD.gn

@@ -62,7 +62,9 @@ remoting_android_client_java_tmpl("remoting_android_client_java") {
 
 remoting_apk_tmpl("remoting_apk") {
   apk_name = "Chromoting"
-  java_files = [ "//remoting/android/apk/src/org/chromium/chromoting/RemotingApplication.java" ]
+  sources = [
+    "//remoting/android/apk/src/org/chromium/chromoting/RemotingApplication.java",
+  ]
   deps = [
     ":remoting_android_client_java",
     "//base:base_java",
@@ -85,7 +87,7 @@ instrumentation_test_apk("remoting_test_apk") {
   target_sdk_version = 23
   apk_name = "ChromotingTest"
   apk_under_test = ":remoting_apk"
-  java_files = [
+  sources = [
     "javatests/src/org/chromium/chromoting/EventTest.java",
     "javatests/src/org/chromium/chromoting/MockInputStub.java",
     "javatests/src/org/chromium/chromoting/SwipePinchDetectorTest.java",