java.lang.NullPointerException: collection == null

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java.lang.NullPointerException: collection == null
at android.os.Parcel.readException(Parcel.java:1555)
at android.os.Parcel.readException(Parcel.java:1502)
at android.speech.tts.ITextToSpeechService$Stub$Proxy.getVoices(ITextToSpeechService.java:700)
at android.speech.tts.TextToSpeech$15.run(TextToSpeech.java:1712)
at android.speech.tts.TextToSpeech$15.run(TextToSpeech.java:1677)
at android.speech.tts.TextToSpeech$Connection.runAction(TextToSpeech.java:2232)
at android.speech.tts.TextToSpeech.runAction(TextToSpeech.java:742)
at android.speech.tts.TextToSpeech.runAction(TextToSpeech.java:732)
at com.foo.android.common.tts.TTSManager.setNetworkSynthesisAPI21(Unknown Source)
at com.foo.android.common.tts.TTSManager._speakUtterance(Unknown Source)
at com.foo.android.common.tts.TTSManager.continueWithNextUtterance(Unknown Source)
at com.foo.android.common.tts.TTSManager._queueUtterance(Unknown Source)
at com.foo.android.common.tts.TTSManager._speak(Unknown Source)
at com.foo.android.common.tts.TTSManager.speak(Unknown Source)
at com.foo.android.common.ui.conversation.VoiceConversation.speakWithSilent(Unknown Source)
at com.foo.android.common.ui.conversation.VoiceConversation.speak(Unknown Source)
at com.foo.assist.android.ui.activities.voice.BluetoothSupportedVoiceConversation.speak(BluetoothSupportedVoiceConversation.java:128)
at com.foo.assist.android.ui.activities.voice.PendingReminderConversation.speak(PendingReminderConversation.java:264)
at com.foo.android.common.ui.conversation.SystemQuestion.tell(Unknown Source)
at com.foo.android.common.ui.conversation.SystemQuestion$1.run(Unknown Source)
at com.foo.java.common.util.Threads$2.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)

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