Add android.mojo application.

services/android/BUILD.gn

Index: services/android/BUILD.gn
diff --git a/services/input/BUILD.gn b/services/android/BUILD.gn
similarity index 68%
copy from services/input/BUILD.gn
copy to services/android/BUILD.gn
index dac96c98d3aa83dff62686d6e8f58e05ebac9e3b..ecc00dcf13b392cf255d0cbeea6d53f57744318d 100644
--- a/services/input/BUILD.gn
+++ b/services/android/BUILD.gn
@@ -5,12 +5,12 @@
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
-android_library("input") {
-  java_files = [ "src/org/chromium/mojo/input/InputServiceImpl.java" ]
+android_library("android") {

[ppi, 2015/11/24 12:17:57]

why not call the application and the directory "activity", matching what is in
Flutter? I realize this is very Android-specific, but many of the services we
have in services/ are to various degree tied with how Android APIs look like. I
think we might want to stick to the convention of naming services by what they
do not where they run for clarity.

[qsr, 2015/11/24 13:05:05]

Add comment about the fact that this application regroups all android specific
services.

+  java_files = [ "src/org/chromium/mojo/android/ActivityImpl.java" ]
 
   deps = [
     "//mojo/public/java:bindings",
     "//mojo/public/java:system",
-    "//mojo/services/input/interfaces:interfaces_java",
+    "//mojo/services/android/interfaces:interfaces_java",
   ]
 }