Revert "Disallow starting activities without new task from non-activity context."

This reverts commit 8b49a5c0aa.

Change-Id: I7d2da4ac72ca578942b38fccf8b151f3a2ed081f

core/java/android/app/ContextImpl.java

@@ -843,9 +843,8 @@ class ContextImpl extends Context {
         // Calling start activity from outside an activity without FLAG_ACTIVITY_NEW_TASK is
         // generally not allowed, except if the caller specifies the task id the activity should
         // be launched in.
-        if ((intent.getFlags() & Intent.FLAG_ACTIVITY_NEW_TASK) == 0
-                && (options == null
-                || ActivityOptions.fromBundle(options).getLaunchTaskId() == -1)) {
+        if ((intent.getFlags()&Intent.FLAG_ACTIVITY_NEW_TASK) == 0
+                && options != null && ActivityOptions.fromBundle(options).getLaunchTaskId() == -1) {
             throw new AndroidRuntimeException(
                     "Calling startActivity() from outside of an Activity "
                     + " context requires the FLAG_ACTIVITY_NEW_TASK flag."