fix(ngRoute): remove unnecessary call to decodeURIComponent

Since `$location.$$path` is already decoded, doing an extra `decodeURIComponent` is both unnecessary
and can cause problems. Specifically, if the path originally includes an encoded `%` (aka `%25`),
then ngRoute will throw "URIError: URI malformed".

Closes angular#6326
Closes angular#6327

src/ngRoute/route.js

@@ -468,9 +468,7 @@ function $RouteProvider(){
       for (var i = 1, len = m.length; i < len; ++i) {
         var key = keys[i - 1];
 
-        var val = 'string' == typeof m[i]
-              ? decodeURIComponent(m[i])
-              : m[i];
+	      var val = m[i];
 
         if (key && val) {
           params[key.name] = val;

test/ngRoute/routeSpec.js

@@ -219,13 +219,13 @@ describe('$route', function() {
       expect($route.current).toBeUndefined();
     }));
 
-    it('matches literal .', inject(function($route, $location, $rootScope) {
+    it('matches literal *', inject(function($route, $location, $rootScope) {
       $location.path('/$testX23/foo*(bar)/222');
       $rootScope.$digest();
       expect($route.current).toBeUndefined();
     }));
 
-    it('matches literal *', inject(function($route, $location, $rootScope) {
+    it('matches literal .', inject(function($route, $location, $rootScope) {
       $location.path('/$test.23/foooo(bar)/222');
       $rootScope.$digest();
       expect($route.current).toBeUndefined();
@@ -238,7 +238,7 @@ describe('$route', function() {
     }));
 
     it('matches a URL with special chars', inject(function($route, $location, $rootScope) {
-      $location.path('/$test.23/foo*(bar)/222');
+      $location.path('/$test.23/foo*(bar)/~!@#$%^&*()_+=-`');
       $rootScope.$digest();
       expect($route.current).toBeDefined();
     }));