Fix Android comment and docblock typos

Summary:
👋 Hello! Thanks for react-native, it’s a great project.

I was digging into the Android implementation in _ReactAndroid_ and noticed a couple typos in the documentation. I went through and tried to fix all the typos I could find using [aspell](http://aspell.net).

Not applicable: these changes are only to comments, and CI should be skipped.

[ANDROID][ENHANCEMENT][*] - Correct comment and docblock typos
Closes https://github.com/facebook/react-native/pull/17049

Differential Revision: D6472182

Pulled By: shergin

fbshipit-source-id: 7e62cab118609596b483d1cf16c3abf651d6753b

ReactAndroid/src/main/java/com/facebook/react/flat/FlatUIImplementation.java

@@ -53,7 +53,7 @@ public class FlatUIImplementation extends UIImplementation {
 
   /**
    * Build the map of view managers, checking that the managers FlatUI requires are correctly
-   * overriden.
+   * overridden.
    */
   private static Map<String, ViewManager> buildViewManagerMap(List<ViewManager> viewManagers) {
     Map<String, ViewManager> viewManagerMap = new HashMap<>();
@@ -149,7 +149,7 @@ public class FlatUIImplementation extends UIImplementation {
     if (mRCTImageViewManager != null) {
       // This is not the best place to initialize DraweeRequestHelper, but order of module
       // initialization is undefined, and this is pretty much the earliest when we are guarantied
-      // that Fresco is initalized and DraweeControllerBuilder can be queried. This also happens
+      // that Fresco is initialized and DraweeControllerBuilder can be queried. This also happens
       // relatively rarely to have any performance considerations.
       mReactContext.getNativeModule(FrescoModule.class); // initialize Fresco
       DraweeRequestHelper.setDraweeControllerBuilder(