feature: Add espresso bridge (#705)

feature: Add espresso bridge

Author: KazuCocoa

lib/appium_lib/android/common/helper.rb

@@ -120,8 +120,11 @@ def page(opts = {})
 
     # example line:
     # "mFocusedApp=AppWindowToken{b1420058 token=Token{b128add0
-    #  ActivityRecord{b1264d10 u0 com.example.android.apis/io.appium.android.apis.ApiDemos t23}}}"
+    #  ActivityRecord{b1264d10 u0 com.example.android.apis/.ApiDemos t23}}}"
     def current_app
+      warn '[DEPRECATION] current_app will be removed since it work only local.' \
+             'Please use current_activity and current_app to know package and activity for current app'
+
       line = `adb shell dumpsys window windows`.each_line.grep(/mFocusedApp/).first.strip
 
       _parse_current_app_line line

lib/appium_lib/android/espresso/bridge.rb

@@ -0,0 +1,14 @@
+require_relative '../android'
+
+module Appium
+  module Android
+    module Espresso
+      class Bridge
+        def self.for(target)
+          target.extend Appium::Android
+          target.extend Appium::Android::Espresso
+        end
+      end
+    end
+  end
+end

lib/appium_lib/core/common/device.rb

@@ -27,7 +27,7 @@ module Device
       #   @return [String] An activity name
       #
       #   ```ruby
-      #   current_activity # 'io.appium.android.apis.ApiDemos'
+      #   current_activity # '.ApiDemos'
       #   ```
 
       # @!method current_package