Not updated to support 0.5.1-preview

[clhols]

When trying to run on 0.5.1-preview I get the following exception:

com.example.androidthings.bluetooth.audio E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                         Process: com.example.androidthings.bluetooth.audio, PID: 1948
                                                                                         java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.androidthings.bluetooth.audio/com.example.androidthings.bluetooth.audio.A2dpSinkActivity}: java.lang.SecurityException: Caller lacks required permission com.google.android.things.permission.MANAGE_INPUT_DRIVERS
                                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
                                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
                                                                                             at android.app.ActivityThread.-wrap11(Unknown Source:0)
                                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
                                                                                             at android.os.Handler.dispatchMessage(Handler.java:105)
                                                                                             at android.os.Looper.loop(Looper.java:164)
                                                                                             at android.app.ActivityThread.main(ActivityThread.java:6541)
                                                                                             at java.lang.reflect.Method.invoke(Native Method)
                                                                                             at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
                                                                                          Caused by: java.lang.SecurityException: Caller lacks required permission com.google.android.things.permission.MANAGE_INPUT_DRIVERS
                                                                                             at android.os.Parcel.readException(Parcel.java:1942)
                                                                                             at android.os.Parcel.readException(Parcel.java:1888)
                                                                                             at com.google.android.things.userdriver.IInputDriverService$Stub$Proxy.createInputDevice(IInputDriverService.java:140)
                                                                                             at com.google.android.things.userdriver.InputDriver.initialize(InputDriver.java:241)
                                                                                             at com.google.android.things.userdriver.InputDriverManager.addInputDriver(InputDriverManager.java:47)
                                                                                             at com.google.android.things.userdriver.UserDriverManager.registerInputDriver(UserDriverManager.java:83)
                                                                                             at com.google.android.things.contrib.driver.button.ButtonInputDriver.register(ButtonInputDriver.java:83)
                                                                                             at com.example.androidthings.bluetooth.audio.A2dpSinkActivity.configureButton(A2dpSinkActivity.java:311)
                                                                                             at com.example.androidthings.bluetooth.audio.A2dpSinkActivity.initA2DPSink(A2dpSinkActivity.java:247)
                                                                                             at com.example.androidthings.bluetooth.audio.A2dpSinkActivity.onCreate(A2dpSinkActivity.java:173)

So it needs me to request the MANAGE_INPUT_DRIVERS permission. And if I do that:
ActivityCompat.requestPermissions(this, new String[]{"com.google.android.things.permission.MANAGE_INPUT_DRIVERS"}, 0);

Then the UI displays an "Allow ... to perform" dialog. But if my IoT device doesn't have screen and input then you can't click the allow button.

[pdominique]

@clhols the app starts for me on a Pi 3 with dev preview 0.5.1 and I can hear an audio sample. However I can't connect to the device: #6