Reformat all gn files in /android_webview/tools/automated_ui_tests/BUILD.gn.

`gn format` recently changed its formatting behavior
for deps, source, and a few other elements when they
are assigned (with =) single-element lists to be consistent
with the formatting of updates (with +=) with single-element.

Now that we've rolled in a GN binary with the change,
reformat all files so that people don't get presubmit
warnings due to this.

This CL was uploaded by git cl split.

R=ntfschr@chromium.org

Bug: 1041419
Change-Id: I24f1a8ce0a32854fad3be2f645dd801f20e583ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1998381
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732254}

android_webview/tools/automated_ui_tests/BUILD.gn

@@ -23,9 +23,8 @@ android_apk("webview_ui_test_app_apk") {
 }
 
 android_library("webview_ui_test_app_java") {
-  sources = [
-    "java/src/org/chromium/webview_ui_test/WebViewUiTestActivity.java",
-  ]
+  sources =
+      [ "java/src/org/chromium/webview_ui_test/WebViewUiTestActivity.java" ]
   deps = [
     ":webview_ui_test_app_apk_resources",
     "//base:base_java",
@@ -67,8 +66,6 @@ instrumentation_test_apk("webview_ui_test_app_test_apk") {
     "//third_party/junit",
     "//third_party/ub-uiautomator:ub_uiautomator_java",
   ]
-  data = [
-    "test/data/",
-  ]
+  data = [ "test/data/" ]
   use_webview_provider = system_webview_apk_target
 }