Event: Don't test stopImmediatePropagation in Android 2.3

Android 2.3 doesn't support stopImmediatePropagation; jQuery fallbacks
to stopPropagation in such a case.

test/unit/event.js

@@ -387,7 +387,13 @@ test("on immediate propagation", function() {
 });
 
 test("on bubbling, isDefaultPrevented, stopImmediatePropagation", function() {
-	expect( 3 );
+	// Support: Android 2.3
+	if ( /android 2\.3/i.test( navigator.userAgent ) ) {
+		expect( 2 );
+	} else {
+		expect( 3 );
+	}
+
 	var $anchor2 = jQuery( "#anchor2" ),
 		$main = jQuery( "#qunit-fixture" ),
 		neverCallMe = function() {
@@ -418,13 +424,18 @@ test("on bubbling, isDefaultPrevented, stopImmediatePropagation", function() {
 	$anchor2.off( "click" );
 	$main.off( "click", "**" );
 
-	$anchor2.on( "click", function( e ) {
-		e.stopImmediatePropagation();
-		ok( true, "anchor was clicked and prop stopped" );
-	});
-	$anchor2[0].addEventListener( "click", neverCallMe, false );
-	fakeClick( $anchor2 );
-	$anchor2[0].removeEventListener( "click", neverCallMe );
+	// Android 2.3 doesn't support stopImmediatePropagation; jQuery fallbacks to stopPropagation
+	// in such a case.
+	// Support: Android 2.3
+	if ( !/android 2\.3/i.test( navigator.userAgent ) ) {
+		$anchor2.on( "click", function( e ) {
+			e.stopImmediatePropagation();
+			ok( true, "anchor was clicked and prop stopped" );
+		});
+		$anchor2[0].addEventListener( "click", neverCallMe, false );
+		fakeClick( $anchor2 );
+		$anchor2[0].removeEventListener( "click", neverCallMe );
+	}
 });
 
 test("on(), iframes", function() {