[ABANDONED] Chromium in deb format with VAAPI support

==NOTICE==
This PPA was abandoned at the end of 2020 and probably won't be updated anymore.
Recommended alternatives: Google Chrome or Mozilla Firefox

Reasons to drop it:
1) VAAPI (hardware video decoding for Intel/AMD on X11) was the main reason to maintain it. Since version 88 it should be available for all Chromium-based browsers. Copy address bellow to your address bar and check if it's enabled (may work for other Chromium-based browsers (e.g. Brave, Vivaldi, Opera, Edge))
chrome://flags/#enable-accelerated-video-decode

2) Since March 15 2021 Sync wouldn't work because Google denied usage of GOOGLE_API_KEY for anything other than Google Chrome.

3) ARM64 builds probably would be useful for someone but unfortunately I don't have devices to test it.

===Old description===

Chromium in deb format with VAAPI support
* Copied sources from Bionic repository or from "stage for security updates" (https://launchpad.net/~canonical-chromium-builds/+archive/ubuntu/stage)
* Enabled VAAPI components building in debian/rules and debian/control
* Enabled VAAPI by default
* Applied additional Fedora patches
    * enable-hardware-accelerated-mjpeg.patch
    * fix-vaapi-on-intel.patch
    (https://src.fedoraproject.org/rpms/chromium/blob/master/f/chromium.spec)
* Builds for current LTS (Focal, 20.04) and previous (Bionic, 18.04 (with workaround to disable some 10-bit formats because libva is too old))
* ARM64 is not tested
* Currently doesn't work with Wayland or NVidia hardware

Other options for Ubuntu: saiarcot895 ppa (needs GOOGLE_API_KEY which can be extracted from sources of this or "staging" ppa), Brave, ungoogled-chromium.

In order to avoid installation of snap package on Ubuntu 20.04, you can "pin" this PPA with a command bellow:

cat <<EOF | sudo tee /etc/apt/preferences.d/pin-xalt7x-chromium-deb-vaapi
Package: *
Pin: release o=LP-PPA-xalt7x-chromium-deb-vaapi
Pin-Priority: 1337
EOF