fix: Android E2E aliceTile race + bundle deploy-android infra

The Android UI integration test failed at tap(aliceTile) with "0 widgets"
even though pumpUntil had just found the tile. On the slow software-rendered
emulator the route-pop animation finalises during pumpUntil's trailing 300 ms
settle, briefly leaving the tile out of the tree. Re-confirm with a second
pumpUntil before the tap.

Bundles the previously uncommitted infra changes that make task deploy-android
run end-to-end inside nix develop: Linux desktop runtime libs + GL software
rendering env in flake.nix, path_provider_android pin to <2.3 to avoid the
libdartjni SIGSEGV, deferred DB-path resolution after WidgetsFlutterBinding,
+iglx for xvfb-run, platform-tools on PATH, and a single pre-commit script
replacing the dart-format / task-check-fast pair.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

next.md

@@ -17,17 +17,3 @@ Git repo should not contain unknown files.
 Then commit.
 
 ## Tasks
-
-fix:
-
-[6ms] no emulator running — booting AVD sharedinbox_test
-Emulator did not become ready within 120 s
-task: Failed to run task "deploy-android": task: Failed to run task "integration-android": exit status 1
-
-Why does the emulator not start? Where are the logs?
-
-After that: task deploy-android
-
-fix, if it fails.
-
----