Reformat Android.bp file

This commit replaces `=` with `:`, which is more idiomatic.  Besides,
this commit refines the whitespace between brackets and add commas to
the end of the list.

Test: aosp_sailfish-userdebug builds
Change-Id: I5977fd1690c7890318ec3d0e5f0238803eafe3e8
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index a49c8c8..19a46f6 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -12,7 +12,7 @@
         "-Werror",
         "-Wno-unused-parameter",
     ],
-    shared_libs = [
+    shared_libs: [
         "libcutils",
         "liblog",
         "libutils",