Updater: Allow starting activities from background

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05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: FATAL EXCEPTION: main
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: Process: com.shiftos.updater, PID: 19707
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.shiftos.updater/org.lineageos.updater.controller.UpdaterService }: app is in background uid UidRecord{1463ce2 u0a63 TPSL bg:+47m50s26ms idle change:idle procs:1 seq(0,0,0)}
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.ContextImpl.startServiceCommon(ContextImpl.java:1616)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.ContextImpl.startService(ContextImpl.java:1571)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.content.ContextWrapper.startService(ContextWrapper.java:669)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at org.lineageos.updater.UpdatesActivity.onStart(UpdatesActivity.java:181)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1433)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.Activity.performStart(Activity.java:7847)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3295)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2017)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:107)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:214)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:7397)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
05-06 17:21:58.988 10063 19707 19707 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)

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Change-Id: Ibc2d471b028c1d4e824b3ede4bbc336d76801f88
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>