[TIMOB-26317] Android: exception handler throws a NullPointerException

Hi, I had these issue while I was debugging a native module. When a java exception occurs, a NullPointerException is thrown when jsstack is null, trying to call .contains on a null string. https://github.com/appcelerator/titanium_mobile/blob/dc00603cdc187b56531b615ce8e864c6597157f4/android/titanium/src/java/org/appcelerator/titanium/TiExceptionHandler.java#L100-L105 {quote} Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.contains(java.lang.CharSequence)' on a null object reference at org.appcelerator.titanium.TiExceptionHandler.getError(TiExceptionHandler.java:100) at org.appcelerator.titanium.TiExceptionHandler.handleOpenErrorDialog(TiExceptionHandler.java:141) at org.appcelerator.titanium.TiExceptionHandler.openErrorDialog(TiExceptionHandler.java:121) at org.appcelerator.titanium.TiExceptionHandler.handleException(TiExceptionHandler.java:246) at org.appcelerator.kroll.KrollRuntime.dispatchException(KrollRuntime.java:540) at org.appcelerator.titanium.TiApplication$1.uncaughtException(TiApplication.java:365) at org.appcelerator.titanium.TiBaseActivity.onCreate(TiBaseActivity.java:677) at org.appcelerator.titanium.TiActivity.onCreate(TiActivity.java:22) at android.app.Activity.performCreate(Activity.java:6975) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770) ... 9 more {quote} Also, the new exception handler doesn't include the java exception title and message.