angular - Separate interfaces for each lifecycle hook (#16299)

* Separate interfaces for each lifecycle hook

Having one required hook per interface leads to greater type safety than
having a single IController interface with all properties optional.
Namely, the IController interface will not help you if you misspell a hook
name. (A slight improvement, admittedly, but an improvement nonetheless.)

This is closer to how the typings are done for lifecycle hooks in ng2.

* Use `dtslint`

* Fix trailing whitespace

types/angular/tslint.json

@@ -17,4 +17,4 @@
         "unified-signatures": false,
         "void-return": false
     }
-}
+}