wam, chromium, html5-*: improve initial frame, and drop usage of config.xml

Move to use appinfo.json, new CLI interface, and fix flickering
partially.

chromium87: be0370b198..c9a66f75a7
c9a66f75a7 fixup! [op][n_upsable][splash][fmp] New splash and FMP implementation
d7953f5e17 Revert "[op][agl][splash] Show immediately apps"

wam: 8dd3f17..f4c2e95
f4c2e95 fixup! agl/web_app_manager_service_agl: Fix minor typo
c072a91 agl/web_app_manager_service_agl: Fix minor typo
761961c web_runtime_agl, web_app_manager_service_agl: Add WebOS appinfo.json support
1ac280e web_runtime_agl: Pass arguments rather than env variables
6e0477f web_runtime_agl: remove setupsurface, nobody is using it
0d83a34 web_runtime_agl: Remove CYNOGARA auth token
4159489 fixup! [op][agl][wayland] Properly adapt dimensions for web apps using panel

html5-homescreen: 21bd1dc..7d89048
7d89048 Launch background after launcher.
5c9e060 Use appinfo.json instead of config.xml
* Change branch to master

html5-launcher: b371797..cb6b66c
cb6b66c  Use appinfo.json instead of config.xml
* Change branch to master

html5-background: 16db46b..7b79640
7b79640 Use appinfo.json instead of config.xml
160a4f9 Add .gitreview file
* Use AGL gerrit and change branch to master

html5-hvac: 45641bf..e64d69b
e64d69b Use appinfo.json instead of config.xml
* Change branch to master

Bug-AGL: SPEC-3982, SPEC-4251, SPEC-4301, SPEC-4312, SPEC-4315
Change-Id: Ibd2bc428910e6e39c52e14b8e969fdea77000a84
Signed-off-by: Jose Dapena Paz <jdapena@igalia.com>