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/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index ae589ca..89d2ef2 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -73,8 +73,8 @@
 cc_library_headers {
     name: "libsurfaceflinger_headers",
     export_include_dirs: ["."],
-    static_libs = ["libserviceutils"],
-    export_static_lib_headers = ["libserviceutils"],
+    static_libs: ["libserviceutils"],
+    export_static_lib_headers: ["libserviceutils"],
 }
 
 filegroup {
@@ -144,7 +144,7 @@
         "frameworks/native/vulkan/include",
     ],
     cppflags: [
-        "-fwhole-program-vtables",  // requires ThinLTO
+        "-fwhole-program-vtables", // requires ThinLTO
     ],
     lto: {
         thin: true,