title: Reliable source for older releases of Google Play Services API
body: <p>I'm working on an App that uses Google Play Services' GcmNetworkManager. This <a href="http://android-developers.blogspot.com/2015/05/a-closer-look-at-google-play-services-75.html" rel="nofollow noreferrer">feature was introduced in v7.5</a>, so to maximize the number of devices where my app will not need to ask the user to update Google Play Services, I would like to build my app against that version of the API files.</p>
  
  <p>Unfortunately, I don't seem to be able to select an older version in the Android SDK Manager. There are several websites that come up in a Google search that provide older API versions, but none of them seem to be official Google pages, so I'm a little hesitant to use them for security reasons.</p>
  
  <p>I'd also rather not use the trick suggested in the answer to a similar question here (<a href="https://stackoverflow.com/a/32859695/1217178">https://stackoverflow.com/a/32859695/1217178</a>) since I have no idea whether there are parts of the API that will crash if they are tricked into executing against an untested older version of the APK.</p>