fix(android/engine): Ignore updating invalid selections

[darcywong00]

Fixes #11506
Fixes KEYMAN-ANDROID-3A2
Fixes KEYMAN-ANDROID-3Z4 (second time)

This adds more sanity-checking to KMKeyboard.updateSelectionRange(). Will 🍒 pick to stable-17.0

Don't attempt to process selection if

• text is empty
• selection is past the current text

I can verify these hit the debugger (selMax is 23 when the raw text length is 23). But I can't repro the crashes in the Sentry issue.

User Testing

Setup - Install the PR build of Keyman for Android

• TEST_INVALID_SELECTIONS - Verifies app does not crash on invalid selections

1. Launch Keyman
2. In the Keyman app, type some text
3. Move the cursor to earlier in the text
4. Move the cursor past the text
5. Verify cursor is at the right of the text

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ✅ TEST_INVALID_SELECTIONS (PASSED): I tested this issue with the attached "Keyman 18.0.42-alpha-test-11510" build on an Android 14(physical device: Samsung Galaxy A23) environment: Here is my observation. (notes)

Test Artifacts

• Android
  • Keyman for Android apk
  • FirstVoices for Android 16.0 apk
  • FirstVoices Keyboards for Android apk
  • KeyboardHarness apk
  • Keyman for Android 16.0 apk
  • KMSample1 apk
  • KMSample2 apk

[dinakaranr]

Test Results

• TEST_INVALID_SELECTIONS (PASSED): I tested this issue with the attached "Keyman 18.0.42-alpha-test-11510" build on an Android 14(physical device: Samsung Galaxy A23) environment: Here is my observation.

1. Installed the "Keyman 18.0.42.apk" file and gave all permissions to the application.
2. Checked the "Enable Keyman as system-wide keyboard" and set the keyboard as the default keyboard box on the settings page.
3. Open the Keyman text editor.
4. Enter a sentence text.
5. Move the cursor to earlier in the text.
6. Move the cursor past the text.
   Here, Observed that the cursor is present at the right of the text. It works well. Thank you.

[keyman-server]

Changes in this pull request will be available for download in Keyman version 18.0.44-alpha