Cryptfs: don't assume you know your fstab
MultiROM secondary ROMs fstabs are harder to find that the primary one, so this return becomes borked.
This causes Developer Settings in Settings app to throw a Runtime exception:
09-20 11:45:54.876 1458 1458 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.settings/com.android.settings.Settings$DevelopmentSettingsActivity}: java.lang.IllegalStateException: command '4 cryptfs isConvertibleToFBE' failed with 'null'
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.app.ActivityThread.-wrap12(ActivityThread.java)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.os.Looper.loop(Looper.java:154)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6077)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: Caused by: java.lang.IllegalStateException: command '4 cryptfs isConvertibleToFBE' failed with 'null'
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1691)
09-20 11:45:54.876 1458 1458 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1636)
1 file changed