feat: share more code from android branch

component/mmdb/patch_android.go

@@ -0,0 +1,18 @@
+// +build android
+
+package mmdb
+
+import "github.com/oschwald/maxminddb-golang"
+
+func InstallOverride(override *maxminddb.Reader) {
+	newReader := Reader{Reader: override}
+	switch override.Metadata.DatabaseType {
+	case "sing-geoip":
+		reader.databaseType = typeSing
+	case "Meta-geoip0":
+		reader.databaseType = typeMetaV0
+	default:
+		reader.databaseType = typeMaxmind
+	}
+	reader = newReader
+}