Reformat Android.bp file

This commit replaces `=` with `:`, which is more idiomatic.  Besides,
this commit adds a comma to the end of list and cleans some whitespaces.

Test: walleye-userdebug builds
Change-Id: I170f868752510943ed2bcf307fe12ee062bc1a69
diff --git a/services/utils/tests/Android.bp b/services/utils/tests/Android.bp
index 15829fa..f21254c 100644
--- a/services/utils/tests/Android.bp
+++ b/services/utils/tests/Android.bp
@@ -17,13 +17,13 @@
 cc_test {
     name: "prioritydumper_test",
     test_suites: ["device-tests"],
-    srcs: [ "PriorityDumper_test.cpp"],
+    srcs: ["PriorityDumper_test.cpp"],
     shared_libs: [
         "libutils",
     ],
-    static_libs = [
+    static_libs: [
         "libgmock",
-        "libserviceutils"
+        "libserviceutils",
     ],
     clang: true,
-}
\ No newline at end of file
+}