Fix IME commitText() to enable voice dictation and swipe typing

[AFK-Automations]

Problem

Android IME text input via commitText() is silently dropped during streaming. This means Gboard voice dictation, swipe typing, and autocomplete suggestions never reach the host - the keyboard appears to listen but no text arrives on the remote PC. Reported in #1496.

Root Cause

Moonlight handles keyboard input through onKeyDown()/onKeyUp() which only processes individual KeyEvent objects. When Gboard voice engine or swipe/autocomplete completes, Android calls commitText() on the active InputConnection. No custom InputConnection was provided, so the committed text was never forwarded to the host.

Fix

• Created StreamInputConnection extending BaseInputConnection that intercepts commitText() and routes text through the existing sendUtf8Text() protocol method
• Added onCreateInputConnection() override on StreamView to provide the custom InputConnection during streaming
• Also handles deleteSurroundingText() for IME-driven backspace/delete
• setComposingText() and finishComposingText() handled gracefully to prevent errors during in-progress dictation

What works after this change

• Gboard voice dictation -> text appears on host
• Gboard swipe typing -> text appears on host
• Autocomplete/suggestion taps -> text appears on host
• Regular key-by-key typing -> unchanged, still works through existing KeyEvent path
• Combining accents -> unchanged, still works

Files changed

• StreamInputConnection.java -- new file
• StreamView.java -- added onCreateInputConnection() override
• Game.java -- passes NvConnection reference to StreamView

Tested on Android with Gboard, connected to Sunshine host on Windows 11. Voice dictation, swipe typing, autocomplete, and regular typing all function correctly. No regressions observed.

Closes #1496