v1.190.0

Breaking changes

• The GVR SDK was refactored to a single sdk-base.aar.
• Due to a quirk in the build system, a dummy sdk-audio.aar is needed for
  this release. This is only required if your VR app uses the Exoplayer
  library similar to the sdk-videoplayer sample. This library won't be
  needed in future versions of the GVR SDK.

Deprecations

• The Android VrView widgets and samples have been removed from the SDK. If
  you still want to use these widgets, you will need to use a previous version
  of the SDK. The recommended migration path is to use the sdk-video360
  sample as a starting point for creating your own widgets.

Other changes

• Improved the controller rendering in ndk-hellovrbeta.