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>

Taskfile.yml

@@ -35,7 +35,7 @@ tasks:
     preconditions:
       - sh: command -v clang >/dev/null 2>&1
         msg: "Linux desktop deps missing. Run: sudo apt-get install -y clang cmake ninja-build pkg-config libgtk-3-dev libstdc++-12-dev"
-      - sh: /usr/bin/pkg-config --exists gtk+-3.0 2>/dev/null
+      - sh: pkg-config --exists gtk+-3.0 2>/dev/null
         msg: "Linux desktop deps missing. Run: sudo apt-get install -y clang cmake ninja-build pkg-config libgtk-3-dev libstdc++-12-dev"
 
   install-hooks: