Work app store

[fynngodau]

Supersedes and contains #2500. Supersedes and contains #2521.

Allows users to download apps to their work profile using the special vending component "Work app store". This component is disabled, and enabled only when a work profile is added (which in turn can only be done by a device or profile admin).

Yet to do:

• rewrite download code for components (https://github.com/microg/GmsCore/pull/2500#discussion_r1769604559)
  • [x] don't allocate RAM for the entire download
  • [x] download directly to installer session
• add meaningful progress information
  • [x] to store app
  • [x] while downloading in the background through store app
  • [x] while splitinstalling
• [x] determine and verify meaning of policy field in /getEnterpriseClientPolicy
• [x] test additional dpc services
• [x] show Work app store only after adding work account
• [ ] automatic dependency installation (i.e. installing Google Chrome), see https://gitlab.com/AuroraOSS/AuroraStore/-/issues/346)
• [ ] acquire user consent before provisioning work account
• [ ] automatically install / remove apps on demand of dpc controller

Current screenshot:

[ale5000-git]

@fynngodau Can it help with Shelter? https://f-droid.org/it/packages/net.typeblog.shelter/

[fynngodau]

@ale5000-git No. This PR adds support for Device Policy Controller apps that want to register a Work google account. See #2521.

[ale5000-git]

Shelter use a work profile, and I remember it was failing on my device but I'm not sure if the issue is with microG or with the ROM.

[DaVinci9196]

@fynngodau Can the download and notification process of game sub-packages be incorporated into this project? The corresponding functions have been implemented in https://github.com/microg/GmsCore/pull/2506.

[fynngodau]

@DaVinci9196 That would be beneficial, though I will not incorporate another PR into this one as it is already quite large.