1) created a new build flavor for espresso tests

2) create a new source set full of espresso tests
3) updated proguard-testing.pro
4) added test device numbers to .gitignore

// FREEBIE

test/androidTestEspresso/java/org/thoughtcrime/securesms/TextSecureWakingTestRunner.java

@@ -0,0 +1,46 @@
+/**
+ * Copyright (C) 2015 Open Whisper Systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.thoughtcrime.securesms;
+
+import android.app.Application;
+import android.app.KeyguardManager;
+import android.content.Context;
+import android.os.PowerManager;
+import android.support.test.runner.AndroidJUnitRunner;
+import android.util.Log;
+
+public class TextSecureWakingTestRunner extends AndroidJUnitRunner {
+
+  @Override public void onStart() {
+    runOnMainSync(new Runnable() {
+      @Override public void run() {
+        Application app        = (Application) getTargetContext().getApplicationContext();
+        String      simpleName = TextSecureWakingTestRunner.class.getSimpleName();
+
+        ((KeyguardManager) app.getSystemService(Context.KEYGUARD_SERVICE))
+            .newKeyguardLock(simpleName)
+            .disableKeyguard();
+
+        ((PowerManager) app.getSystemService(Context.POWER_SERVICE))
+            .newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, simpleName)
+            .acquire();
+      }
+    });
+    super.onStart();
+  }
+
+}