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Opened by Torsten Grote@groteOwner

NPE: ScreenFilterMonitor.getApps()

When you start Briar on an outdated database, you get the notification about the database being corrupted. When you click this, you currently get this crash on master:

E/ACRA: ACRA caught a RuntimeException for org.briarproject.briar.android.debug
                           java.lang.RuntimeException: Unable to start activity ComponentInfo{org.briarproject.briar.android.debug/org.briarproject.briar.android.StartupFailureActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Collection org.briarproject.briar.api.android.ScreenFilterMonitor.getApps()' on a null object reference
                               at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
                               at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
                               at android.app.ActivityThread.-wrap11(Unknown Source:0)
                               at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
                               at android.os.Handler.dispatchMessage(Handler.java:106)
                               at android.os.Looper.loop(Looper.java:164)
                               at android.app.ActivityThread.main(ActivityThread.java:6494)
                               at java.lang.reflect.Method.invoke(Native Method)
                               at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
                               at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
                            Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Collection org.briarproject.briar.api.android.ScreenFilterMonitor.getApps()' on a null object reference
                               at org.briarproject.briar.android.activity.BaseActivity.protectToolbar(BaseActivity.java:218)
                               at org.briarproject.briar.android.activity.BaseActivity.onStart(BaseActivity.java:106)
                               at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1334)
                               at android.app.Activity.performStart(Activity.java:7019)
                               at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2741)
                               at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856) 
                               at android.app.ActivityThread.-wrap11(Unknown Source:0) 
                               at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589) 
                               at android.os.Handler.dispatchMessage(Handler.java:106) 
                               at android.os.Looper.loop(Looper.java:164) 
                               at android.app.ActivityThread.main(ActivityThread.java:6494) 
                               at java.lang.reflect.Method.invoke(Native Method) 
                               at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
                               at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)