Bug 40100: Resolve startup crashes in debug build

* Update Android Components version to 57.0.0.

* Remove feature flag for "View Downloads".

* Update search enginer list from changes by #13452
Co-authored-by: Chenxia Liu <liuche@mozilla.com>

This reverts commit bd7a5375.

for #13479, added a VisualCompletenessQueue.kt class to handle all the functionality related to visual completeness

A no-op clean up.

This refactor, done entirely by IDE, is a no-op cleanup.

This refactor, done entirely by IDE, is a no-op clean-up of this file.

Co-authored-by: Seef <Saif Dara>

* For #11660:added prefetch for topsites

TopSites will be prefetched with observerOnce (wrapper around observerForever).
Also, the SessionControlView.update() is called right away instead of waiting from consumeFrom
in the HomeFragment.onCreateView() which will allow the UI to render all at once on its first
perform traversal

* Removed the submitList(null) since it retriggered a drawing on lower end device

I've currently found out this ones unused.
webPushIntegration removed because looks like all fatal bugs solved as it said from note.

for #11617 added a resetPoliciesAfter ext function for StrictMode, and replaced all existing calls to "resetAfter" with "resetPoliciesAfter" (#11619)

for #7225, Changed strictMode  thread penalty to dialog on startup and back to logs after startup is done. (#10831)

for #7225, refactored and cleanup the branch.

for #7225, change strict mode policy only on main process.

for #7225, setting thread policy inside a seperate thread to keep it from getting overridden in activities.

for #7225 removed Handler().postAtFrontOfQueue as a solution due to unknown side effects. moved the enableStrictMode function to be static so we can reuse it.

for #7225 lint check

for #7225 created strict mode manager and moved enabledStrictMode function inside it.

for #7225 removed penalty death on network

for #7225 added allow disk access on thread for already existing violation


strict mode running in main process to see if it passes the gitlab check, will revert it if it doesnt

allowed diskread for super.onCreate for home activity

added comments for disk violation oncreate homeactivity

added fragment manager inside strictmode manager

allowed disk read for onboarding

allowed disk read for cachedTopSites

In order to hide the time it takes for the account manager to be initialized
(which always involves disk IO, and often network IO), let's kick it off
after "visual completeness".
This makes sure that for most users, by the time they interact with the account
manager-related functionality (e.g. in Settings), it's ready to go.

Also, for signed-in users, this will establish background sync workers.

This replaces the StartupTaskManager we had with a more general class.
New implementation is a thread-safe "gated task executor", which either
runs the task right away if it's marked as 'ready', or queries it to be
executed later on.

This ability to either execute or queue a task will be useful later on in the
commit series.