Disable fetchRemoteLicense for reproducible builds

AboutLibraries fetched license text over the network at build time, which is unavailable on F-Droid's isolated buildserver and produced different license identifiers (SPDX id vs. hash fallback) between environments, breaking APK reproducibility.

app/build.gradle.kts

@@ -153,7 +153,7 @@ android {
 
 aboutLibraries {
     collect {
-        fetchRemoteLicense = true
+        fetchRemoteLicense = false
         fetchRemoteFunding = false
         configPath = file("config")
     }