conditionally add FLAG_ACTIVITY_NEW_TASK when starting page

Subsettings must be started from Activity context, apparently.

Add a flag when it's not started from Activity context. This might not
be catching all cases but should at lesat cover most of them.

Change-Id: I8157ec0cb3d032bb44a0e7dec36637906fc8f1a0
Fixes: 72314527
Test: monkey

src/com/android/settings/Utils.java

@@ -515,7 +515,8 @@ public final class Utils extends com.android.settingslib.Utils {
             Fragment resultTo, int resultRequestCode, String titleResPackageName, int titleResId,
             CharSequence title, boolean isShortcut, int metricsCategory) {
         startWithFragment(context, fragmentName, args, resultTo, resultRequestCode,
-                titleResPackageName, titleResId, title, isShortcut, metricsCategory, 0);
+                titleResPackageName, titleResId, title, isShortcut, metricsCategory,
+                Intent.FLAG_ACTIVITY_NEW_TASK);
     }