Update links to javadoc to point to googleapis.dev (#636)

* Update links to javadoc to point to googleapis.dev

* Fix release notes link

* Fix some GitHub urls

Author: chingor13

README.md

@@ -19,9 +19,9 @@ The library supports the following Java environments:
 
 The following related projects are built on the Google HTTP Client Library for Java:
 
-- [Google OAuth Client Library for Java](https://github.com/google/google-oauth-java-client),
+- [Google OAuth Client Library for Java](https://github.com/googleapis/google-oauth-java-client),
 for the OAuth 2.0 and OAuth 1.0a authorization standards.
-- [Google APIs Client Library for Java](https://github.com/google/google-api-java-client), for
+- [Google APIs Client Library for Java](https://github.com/googleapis/google-api-java-client), for
 access to Google APIs.
 
 This is an open-source library, and
@@ -32,8 +32,8 @@ are welcome.
 
 - [Developer's Guide](https://developers.google.com/api-client-library/java/google-http-java-client/)
 - [Setup Instructions](https://developers.google.com/api-client-library/java/google-http-java-client/setup)
-- [JavaDoc](https://developers.google.com/api-client-library/java/google-http-java-client/reference/index)
-- [Release Notes](https://developers.google.com/api-client-library/java/google-http-java-client/release-notes)
+- [JavaDoc](https://googleapis.dev/java/google-http-client/latest/)
+- [Release Notes](https://github.com/googleapis/google-http-java-client/releases)
 - [Support (Questions, Bugs)](https://developers.google.com/api-client-library/java/google-http-java-client/support)
 
 ## CI Status