This change sets an environment variable to ensure that Android Studio
uses the correct drivers to avoid any breackage when trying to run a
native application on a virtual device.
Without proper configuration `android-studio` would be unable to load
the drivers for the AVD and yield messages like this:
```
3:32 PM Executing tasks: [:app:assembleDebug]
3:32 PM Emulator: libGL error: unable to load driver: i965_dri.so
3:32 PM Emulator: libGL error: driver pointer missing
3:32 PM Emulator: libGL error: failed to load driver: i965
3:32 PM Emulator: libGL error: unable to load driver: i965_dri.so
3:32 PM Emulator: libGL error: driver pointer missing
3:32 PM Emulator: libGL error: failed to load driver: i965
3:32 PM Emulator: libGL error: unable to load driver: swrast_dri.so
3:32 PM Emulator: libGL error: failed to load driver: swrast
3:32 PM Emulator: X Error of failed request: BadValue (integer parameter out of range for operation)
3:32 PM Emulator: Major opcode of failed request: 155 (GLX)
3:32 PM Emulator: Minor opcode of failed request: 24 (X_GLXCreateNewContext)
3:32 PM Emulator: Value in failed request: 0x0
3:32 PM Emulator: Serial number of failed request: 64
3:32 PM Emulator: Current serial number in output stream: 65
3:32 PM Emulator: emulator: ERROR: Missing initial data partition file: /home/ma27/.android/avd/Nexus_5X_API_27.avd/userdata.img
3:32 PM Emulator: Process finished with exit code 1
3:32 PM Gradle build finished with 2 warnings(s) in 6s 378ms
```
For further reference have a look at the following StackOverflow
message: https://stackoverflow.com/a/40790339
This reverts the upgrade to Android Studio 3.0 Beta 3 from commit
22ae3aa5b6 due to an upstream decision.
From the release updates: "Due to an issues with the Android Plugin for
Gradle in Beta 3 (64527520), we've pulled it down and recommend that you
not accept the update. If you already did, you can go back to Beta 2 by
downloading here." [0]
[0]: https://androidstudio.googleblog.com/2017/08/android-studio-30-beta-3-is-now.html
