Android: request redraw after surface-affecting events

[brianconnoly]

Summary

• bind Android resize/redraw delivery to the native surface lifecycle (InitWindow / TerminateWindow) instead of Activity Resume / Pause
• reset the cached surface size for each new native-surface generation, so the first size is emitted even when it matches the previous surface
• suppress surface events while no native window exists and discard stale pending redraw work on termination
• preserve redraw/resize delivery while an existing surface is paused but still present
• retain the scale-factor comparison fix for ConfigChanged

This keeps lifecycle authority aligned with Android's actual native window. A focused SurfaceLifecycle unit test covers suppression, deduplication, paused-but-visible delivery, termination, and same-size recreation.

Validation

• git diff --check
• rustfmt --edition 2024 --check winit-android/src/event_loop.rs
• cargo check -p winit --target aarch64-linux-android --features android-native-activity
• cargo check -p winit-android --tests --target aarch64-linux-android --features native-activity
• full upstream CI matrix passes for commit 04cc1f00

All local Cargo artifacts were written to an external target directory.