Backend improvements (imgui_impl_android.h/.cpp):
- Moved JNI soft-keyboard and Unicode char polling from the example into
the backend. The application no longer needs any JNI boilerplate.
- Added clipboard support via JNI to Android ClipboardManager. (#7259)
- Added display metrics (DPI, density, refresh rate, orientation) via JNI.
Used by the example to set main_scale from actual device density instead
of hardcoded 2.0f.
- BREAKING CHANGE: ImGui_ImplAndroid_Init() now takes additional
asset_manager and native_activity parameters. See before/after in header.
Example (main.cpp):
- Removed ShowSoftKeyboardInput() and PollUnicodeChars() JNI helpers (~120 lines).
- Removed their forward declarations and per-frame calls.
- Updated Init() call to new signature.
- Use ImGui_ImplAndroid_GetDisplayMetrics() for main_scale.
- All other comments, EGL block, GetAssetData, APP_CMD cases unchanged.
MainActivity.kt: unchanged (same 3 JNI bridge methods, now called by backend).
docs/CHANGELOG.txt: Added entries for backend and example changes.
