ZeroMQ address already in use when sometimes initializing android CameraManager

[MankaranSingh]

Happens when switching between apps and sometimes on startup.

java.lang.RuntimeException: Unable to start activity ComponentInfo{ai.flow.android/ai.flow.android.AndroidLauncher}: org.zeromq.ZMQException: Address already in use(0x62)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3707)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3864)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2253)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:201)
	at android.os.Looper.loop(Looper.java:288)
	at android.app.ActivityThread.main(ActivityThread.java:7870)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
Caused by: org.zeromq.ZMQException: Address already in use(0x62)
	at org.zeromq.ZMQ$Socket.bind(Native Method)
	at messaging.ZMQPubHandler.createPublisher(ZMQPubHandler.java:35)
	at ai.flow.android.sensor.CameraManager.<init>(CameraManager.java:99)
	at ai.flow.android.AndroidLauncher.onCreate(AndroidLauncher.java:104)
	at android.app.Activity.performCreate(Activity.java:8057)
	at android.app.Activity.performCreate(Activity.java:8037)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1341)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3688)
	... 12 more