Pixel Experience 12.0 v400.d

Changelog

• Sync with December sources of PE
• Sync with phh's AOSP 12.0 v400.d
• Add dynamic ViPER4Android FX installation (thanks for the help @phhusson and for the tests @gr0ndpa)
• Add slim variant for those of you with a small system partition (without Drive, Gmail, Maps, Photos, Recorder, Wallpapers and Google app)

Notes

• Don't ask for PE+ builds as they will come later in time. In the past, PE team took nearly four months to release the first builds of PE+ after releasing regular PE builds
• Finally, take in consideration phh's notes that should also apply here:

  • This is a pre-release. This is not considered daily-drivable, though your mileage may vary.
  • As you'll notice, there is no A-only variant at the moment. It is still undecided whether A-only variants will later appear.
  • If you want unshared_blocks/read-write system, use vndklite variants. Non-vndklite devices are capable of running vndklite variants.