Android auto update changes

[jigar-f]

This pull request improves error handling and code readability in the Android MethodHandler class and adds new update-related strings to multiple localization files to support new update flows in the app.

Android error handling and code improvements:

• Refactored error handling in several methods in MethodHandler.kt to use runCatching and .onFailure for more consistent and concise error reporting, replacing manual try/catch blocks. This improves maintainability and ensures all errors are reported in a standardized way. [1] [2] [3] [4] [5]
• Improved code readability by formatting long argument lists and intent constructions for better clarity and maintainability. [1] [2]
• Removed an unnecessary closing brace in the MethodHandler class for cleaner structure.

Localization and update flow support:

• Added new strings related to app updates (e.g., "Update now", "Later", "Lantern %s is ready to install", "Couldn't check for updates", etc.) to all supported localization files, enabling a consistent update experience across languages. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19]

[Copilot]

Pull request overview

This PR updates the app’s update-check flow by expanding the Flutter Updater to support Android sideload updates alongside existing desktop auto-updates, refactoring the Android sideload updater implementation (networking, semver comparison, dialogs/telemetry), and adding new i18n strings to support the new update UI.

Changes:

• Add direct Dart dependencies (http, pub_semver) to support Android sideload update networking and version comparison.
• Refactor Android sideload update checking/install prompting (HTTP POST to update endpoint, semver parsing, dialogs/notifications, telemetry logging).
• Add new update-related localization strings across supported .po files and refactor Android MethodHandler error handling/readability.

Reviewed changes

Copilot reviewed 25 out of 26 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pubspec.yaml	Adds http and pub_semver as direct dependencies for update checking/version comparison.
pubspec.lock	Updates lockfile to reflect new direct dependencies.
lib/core/updater/updater.dart	Extends updater logic to treat Android as a supported platform and routes manual checks appropriately.
lib/core/updater/android_sideload_updater.dart	Major refactor: HTTP-based update fetch, semver parsing via pub_semver, UI dialogs/notifications, install flow + telemetry.
lib/core/common/app_urls.dart	Centralizes the Android sideload update endpoint URL.
assets/locales/*.po	Adds new update-flow strings (e.g., Update now/Later/Up to date/check failures).
android/app/src/main/kotlin/org/getlantern/lantern/handler/MethodHandler.kt	Refactors several method handlers to use runCatching and improves formatting/readability.

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