Revert of Disabled two iOS tests due to bot breakage. Affected tests are

webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc

Index: webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc
diff --git a/webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc b/webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc
index dd284c12f8800a612849e3deb780f9d16d5ae5d8..1b7ff5780f9177be6132f184b0b6e4713e904d24 100644
--- a/webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc
+++ b/webrtc/modules/audio_device/ios/audio_device_unittest_ios.cc
@@ -598,8 +598,7 @@
 
 // Tests that recording can be initiated, started and stopped. No audio callback
 // is registered in this test.
-// Disabled due to failure: bugs.webrtc.org/7056
-TEST_F(AudioDeviceTest, DISABLED_StartStopRecording) {
+TEST_F(AudioDeviceTest, StartStopRecording) {
   StartRecording();
   StopRecording();
   StartRecording();
@@ -734,8 +733,7 @@
 // Start playout and read audio from an external PCM file when the audio layer
 // asks for data to play out. Real audio is played out in this test but it does
 // not contain any explicit verification that the audio quality is perfect.
-// Disabled due to failure: bugs.webrtc.org/7056
-TEST_F(AudioDeviceTest, DISABLED_RunPlayoutWithFileAsSource) {
+TEST_F(AudioDeviceTest, RunPlayoutWithFileAsSource) {
   // TODO(henrika): extend test when mono output is supported.
   EXPECT_EQ(1, playout_channels());
   NiceMock<MockAudioTransportIOS> mock(kPlayout);