fix(android): Test keyman-staging i18n

[darcywong00]

Depends on keymanapp/keyman.com#730

This updates the Keyman for Android alpha pre-release to test the i81n of keyman-staging.com

The original implementation of i18n on keyman.com relied on passing a lang= query parameter. Now, the locale is specified first in the URL.

Changes:

• pre-release to use the keyman-staging site in the query
• Loosen the INTERNAL_KEYBOARDS_LINK_FORMATSTR regex to allow for (optional) BCP-47 code in host/{bcp-47}/keyboards... The regex validated if a keyboard link was an internal Keyman.com link.
• Update keyboard link to /go/android/{bcp-47}/{version}/download-keyboards/... (ties to fix: Update /go/android links for BCP-47 🌋 keyman.com#730)

User Testing

Setup - Install the PR build of Keyman for Android on an Android device/emulator. Start with device in English locale

• TEST_KEYBOARD_SEARCH - Verifies keyboard search is localized based on device locale

1. Launch Keyman and dismiss the "Get Started" menu
2. Go to Keyman settings --> Install keyboard or dictionary --> Install from keyman.com
3. Verify keyboard search page appears and is in English
4. Verify you can search for "khmer_angkor" and install it
5. Exit the menus and return to the Keyman app text area
6. From Keyman settings --> Display Language --> Change the display language to "Spanish"
7. Return the keyman settings --> Install keyboard or dictionary --> Install from keyman.com
8. Verify the keyboard search page appears and is in Spanish
9. Verify you can search for "sil_ipa" keyboard and install it

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ⬜ TEST_KEYBOARD_SEARCH (OPEN)

Results Template

# Test Results

* **TEST_KEYBOARD_SEARCH (OPEN):** notes

Test Artifacts

• Android
  • Keyman for Android apk
  • FirstVoices Keyboards for Android apk
  • FirstVoices Keyboards for Android apk (old PRs)
  • KeyboardHarness apk
  • Keyman for Android apk (old PRs)
  • KMSample1 apk
  • KMSample2 apk

[mcdurdin]

• Loosen the INTERNAL_KEYBOARDS_LINK_FORMATSTR regex to allow for (optional) BCP-47 code in host/{bcp-47}/keyboards... The regex validated if a keyboard link was an internal Keyman.com link.

I would like to eliminate this. We should not be reliant on the layout of the website in the app code -- as we can see, that's a painful dependency.

[darcywong00]

• Loosen the INTERNAL_KEYBOARDS_LINK_FORMATSTR regex to allow for (optional) BCP-47 code in host/{bcp-47}/keyboards... The regex validated if a keyboard link was an internal Keyman.com link.

I would like to eliminate this. We should not be reliant on the layout of the website in the app code -- as we can see, that's a painful dependency.

iirc, we use the regex to keep keyman.com/keyboards searches within the in-app webview and send all other links to external browser.