Move talk/app/webrtc to webrtc/api

talk/app/webrtc/androidtests/ant.properties

-# This file is used to override default values used by the Ant build system.
-#
-# This file must be checked into Version Control Systems, as it is
-# integral to the build system of your project.
-
-# This file is only used by the Ant script.
-
-# You can use this to override default values such as
-#  'source.dir' for the location of your java source folder and
-#  'out.dir' for the location of your output folder.
-
-# You can also use it define how the release builds are signed by declaring
-# the following properties:
-#  'key.store' for the location of your keystore and
-#  'key.alias' for the name of the key to use.
-# The password will be asked during the build when you use the 'release' target.
-
-source.dir=../java/testcommon/src;src