fix(android): drop geolocator for a native LocationManager channel

Removes the geolocator dependency, which transitively embedded
com.google.android.gms.* (play-services-location) — proprietary classes
that F-Droid's scanner rejects. The optional coarse-location button now
talks to Android's own LocationManager over a small platform channel
(org.comunes.tane/coarse_location): permission prompt, single coarse fix
with a 12s timeout, last-known fallback, null on any failure. Behavior
is unchanged and the CoarseLocationProvider interface is preserved, so
the UI, i18n and widget tests need no changes.

Also sets dependenciesInfo.includeInApk/Bundle = false so the AGP
dependency-metadata block (also flagged by F-Droid) is not embedded.
Neither change affects the Google Play build.

pubspec.lock

@@ -567,54 +567,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  geolocator:
-    dependency: transitive
-    description:
-      name: geolocator
-      sha256: f62bcd90459e63210bbf9c35deb6a51c521f992a78de19a1fe5c11704f9530e2
-      url: "https://pub.dev"
-    source: hosted
-    version: "13.0.4"
-  geolocator_android:
-    dependency: transitive
-    description:
-      name: geolocator_android
-      sha256: fcb1760a50d7500deca37c9a666785c047139b5f9ee15aa5469fae7dbbe3170d
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.6.2"
-  geolocator_apple:
-    dependency: transitive
-    description:
-      name: geolocator_apple
-      sha256: "853803d6bb1713c094e935b4a5ae5f19c0308acf81da13fa9ff84fb4c70c0b73"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.3.14"
-  geolocator_platform_interface:
-    dependency: transitive
-    description:
-      name: geolocator_platform_interface
-      sha256: cdb082e4f048b69da244117b7914cc60d2a8897546ffaa4f2529c786ded7aee2
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.2.8"
-  geolocator_web:
-    dependency: transitive
-    description:
-      name: geolocator_web
-      sha256: "19e485a0f8d6a88abcf9c53cba3a4105e14b7435ed8ac1c108c067b938fe8429"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.1.4"
-  geolocator_windows:
-    dependency: transitive
-    description:
-      name: geolocator_windows
-      sha256: "175435404d20278ffd220de83c2ca293b73db95eafbdc8131fe8609be1421eb6"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.2.5"
   get_it:
     dependency: transitive
     description: