build(fdroid): drop AGP dependency-metadata block; release v2.7.5

F-Droid's binary scanner (the fdroiddata `check apk` job) rejects any
"extra signing block". Our release APK carried AGP's dependency-metadata
block (id 0x504b4453, ~8 KB) in the APK Signing Block. Disable it with
`dependenciesInfo { includeInApk = false; includeInBundle = false }`.

The block lives in the signing block, not the zip entries, so removing it
changes no build output — v2.7.5 is functionally identical to 2.7.4 and
still reproduces byte-for-byte. Verified locally: a releaseTest build now
carries only the v2 signature + verity padding (no 0x504b4453 block).

This was the last F-Droid blocker: v2.7.5 now clears vcsInfo (since 2.7.3),
foojay (since 2.7.4) and the dependency-metadata block. Bumps versionName
to 2.7.5 and retargets the official recipe draft at v2.7.5.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 20704
-        versionName = "2.7.4"
+        versionCode = 20705
+        versionName = "2.7.5"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -92,6 +92,16 @@ android {
         compose = true
     }
 
+    // Don't embed AGP's dependency-metadata block in the APK signing block. It's
+    // a Play-oriented blob, and F-Droid's reproducible-build scanner rejects any
+    // "extra signing block" — so leaving it in blocks publishing to the official
+    // repo. It lives in the signing block, not the zip entries, so disabling it
+    // doesn't change the build output (reproducibility is unaffected).
+    dependenciesInfo {
+        includeInApk = false
+        includeInBundle = false
+    }
+
     packaging {
         resources {
             excludes += "/META-INF/{AL2.0,LGPL2.1}"