Fixing building of remoting_unittests_apk target.

remoting/remoting_test.gypi

Index: remoting/remoting_test.gypi
diff --git a/remoting/remoting_test.gypi b/remoting/remoting_test.gypi
index bd0ae5a89ef795ce3e7d297f4bd7d5513ed473d5..1c66fe5867547820d35d96f58fdcffc97e52867d 100644
--- a/remoting/remoting_test.gypi
+++ b/remoting/remoting_test.gypi
@@ -246,8 +246,6 @@
         'protocol/ssl_hmac_channel_authenticator_unittest.cc',
         'protocol/third_party_authenticator_unittest.cc',
         'protocol/v2_authenticator_unittest.cc',
-        'signaling/fake_signal_strategy.cc',
-        'signaling/fake_signal_strategy.h',
         'signaling/iq_sender_unittest.cc',
         'signaling/log_to_server_unittest.cc',
         'signaling/server_log_entry_unittest.cc',
@@ -279,6 +277,9 @@
           'dependencies!': [
             'remoting_client_plugin',
           ],
+          'sources/': [
+            ['exclude', '^client/plugin/'],
+          ]
         }],
         [ 'OS=="android"', {
           'dependencies': [