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/androidTest/java/com/facebook/react/tests/CatalystMultitouchHandlingTestCase.java

@@ -68,7 +68,7 @@ public class CatalystMultitouchHandlingTestCase extends ReactAppInstrumentationT
         assertEquals(-1, endEventIndex);
         endEventIndex = i;
       } else if (call.equals("move;2")) {
-        // this will happen more than once, let's just capture the last occurence
+        // this will happen more than once, let's just capture the last occurrence
         moveWithBothPointersEventIndex = i;
       }
     }