Reformat all gn files in /chrome/android/modules/test_dummy/provider/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=estevenson@chromium.org

Bug: 1041419
Change-Id: I1632310782bceaa6249095fc3e72d9a54ebece4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1998959
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#730924}

chrome/android/modules/test_dummy/provider/BUILD.gn

@@ -11,7 +11,5 @@ android_library("java") {
     "//chrome/android/features/test_dummy/public:java",
     "//chrome/android/modules/test_dummy/public:java",
   ]
-  sources = [
-    "java/src/org/chromium/chrome/modules/test_dummy/TestDummyModuleProvider.java",
-  ]
+  sources = [ "java/src/org/chromium/chrome/modules/test_dummy/TestDummyModuleProvider.java" ]
 }