fix build signing for Android 14

src/init.sh

@@ -59,6 +59,22 @@ if [ "$SIGN_BUILDS" = true ]; then
       fi
     done
   fi
+
+  # Android 14 requires to set a BUILD file for bazel to avoid errors:
+  cat > $"KEYS_DIR"/BUILD << _EOB
+# adding an empty BUILD file fixes the A14 build error:
+# "ERROR: no such package 'keys': BUILD file not found in any of the following directories. Add a BUILD file to a directory to mark it as a package."
+# adding the filegroup "android_certificate_directory" fixes the A14 build error:
+# "no such target '//keys:android_certificate_directory': target 'android_certificate_directory' not declared in package 'keys'"
+filegroup(
+name = "android_certificate_directory",
+srcs = glob([
+	"*.pk8",
+	"*.pem",
+]),
+visibility = ["//visibility:public"],
+)
+_EOB
 
   for c in cyngn{-priv,}-app testkey; do
     for e in pk8 x509.pem; do