feature-downloads.

This patch adds a version of `AccountStorage` which is backed by an encrypted-at-rest shared-prefs implementation,
`SecureAbove22Preferences`. As the name suggests, encryption at rest is enabled only for Android API levels 23+.
Otherwise, plaintext storage is used. `SecureAbove22Preferences` will handle API level upgrades behind the scenes,
if necessary.

In order to support rolling this out, `SecureAbove22AccountStorage` automatically migrates account state if it was
present in `SharedPrefAccountStorage`. And vice-versa, `SharedPrefAccountStorage` will automatically migrate account
state if it was present in `SecureAbove22AccountStorage`. This allows applications to easily switch between two
implementations, without any ill-effects.

In order to monitor storage implementations for abnormalities (such as disappearing encryption keys), an optional
`CrashReporter` instance may be configured now via FxaAccountManager.

`DeviceConfig` gained a `secureStateAtRest` flag, which allows applications to specify if they'd like to encrypt
account state. This config object isn't a perfect fit for this flag, but it's close enough conceptually.

The sole reason for authErrorRegistry was to expose an instance of FxaAccountManager
to internal components which don't have direct access to it. The registry acted
an internal singleton, but with a bunch of overhead and conceptual complexity around it.

This patch simplifies this: it adds an actual singleton instead of the registry, with a
simple API for components to call into if they encounter authentication errors.

Behaviour of `handleFxaExceptions` also changed slightly, to reduce cognitive overhead:
- instead of calling into an Async function on the observer, and ignoring the result,
this API is now simply `suspend`, which allows us to reason about error handling within
the FxA state machine terms of structured concurrency.

Other cleanup involves marking an expensive OAuthAccount method as async, as well as some
simplification of error handling in FirefoxAccount.

Prevents "Open in private mode" option from appearing when opening a
window.

Bumps [rubyzip](https://github.com/rubyzip/rubyzip) from 1.2.3 to 2.0.0.
- [Release notes](https://github.com/rubyzip/rubyzip/releases)
- [Changelog](https://github.com/rubyzip/rubyzip/blob/master/Changelog.md)
- [Commits](https://github.com/rubyzip/rubyzip/compare/v1.2.3...v2.0.0

)
Signed-off-by: dependabot[bot] <support@github.com>

Closes #4151: Add get() by Permission Type for SitePermissions and Switched SitePermissions to use @Parcelize.