feat(di): removed app injector

BREAKING CHANGE:

THe appInjector property has been removed. Instead use viewInjector or hostInjector.

modules/angular2/test/transform/directive_linker/simple_files/bar.ng_deps.dart

@@ -14,7 +14,7 @@ void initReflector(reflector) {
       'parameters': const [],
       'annotations': const [
         const Component(
-            selector: '[soup]', appInjector: const [dep.DependencyComponent])
+            selector: '[soup]', viewInjector: const [dep.DependencyComponent])
       ]
     });
 }

modules/angular2/test/transform/directive_linker/simple_files/expected/bar.ng_deps.dart

@@ -15,7 +15,7 @@ void initReflector(reflector) {
       'parameters': const [],
       'annotations': const [
         const Component(
-            selector: '[soup]', appInjector: const [dep.DependencyComponent])
+            selector: '[soup]', viewInjector: const [dep.DependencyComponent])
       ]
     });
   i0.initReflector(reflector);