Add INTERNET permission

See merge request !8

This will be used later by LicensingService

Fix install of language specific split apk

See merge request !7

We were not able to download language specific split apks so far
because they were stored with the "language" key within the
bundle.

appname is changed to App Lounge Store

See merge request !6

Remove useless dependencies and permission

See merge request !5

Rename SplitInstallerService to SplitInstallService

See merge request !4

Implement SplitInstallService

See merge request !3

Some applications which are using GMS can install some features
at runtime with a SplitInstallManager:
https://developer.android.com/guide/playcore/feature-delivery/on-demand

Implemented AppLoungeSplitInstaller which connects to AppLounge
to send install requests.

Implement SplitInstallService skeleton

See merge request !1

Answer that the SplitInstallService API is not available for now
to prevent PayPal app to display an endless Downloading activity.

Fake the billing methods in store so apps don't crash