Use PackageInstaller.session for Nougat (24) and above
- Use the newer public API as the old API which we use has been deprecated.
- Based on AOSP PackageInstaller, https://android.googlesource.com/platform/packages/apps/PackageInstaller/+/06163dec5a23bb3f17f7e6279f6d46e1851b7d16
- Fixes #17 (closed)