Draft: bug_34108+40266+25934+40251+40259+40272: Update components for switch to mozilla88-based Fenix (+ other changes)

Closes #25934 (closed) #40251 (closed) (reviewed in !253 (closed))

Closes #34108 (closed) #40266 (closed) (same patches as in !259 (closed), but with an issue fixed: we were redefining the steps section in projects/geckoview/config and losing the merge_aars step)

Closes #40272 (closed).

Closes #40259 (closed).

Replacing !266 (closed).

projects/android-components/build

@@ -44,7 +44,7 @@ patch -p1 < $rootdir/git.patch
   gradle --debug --no-daemon assemble
 [% ELSE %]
   # Prepare Glean dependencies for offline build
-  tar -xjf $rootdir/glean-parser-[% c('var/glean_parser') %].tar.bz2
+  tar -xf $rootdir/[% c('input_files_by_name/glean') %]
   # We need to set `LC_ALL` and `LANG` to something that is not ASCII as encoding
   # otherwise `click` barfs. See: https://click.palletsprojects.com/python3/
   export LC_ALL=C.UTF-8