Fix F-Droid 1.5.0 build by disabling lockfile enforcement (#16673)

* build_fdroid.sh: Revert unnecessary sed un-bracing

Claude has identified the issue but optimized stuff blindly:
the fact that F-Droid recipe for RustDesk 1.4.9 abused the sed
instruction does not mean it will be abused continuously, nor
that it should be abused (and fixed).

Signed-off-by: Vasyl Gello <vasek.gello@gmail.com>

* build_fdroid.sh: do not attempt applying dropdown patch on 3.44.0+

Signed-off-by: Vasyl Gello <vasek.gello@gmail.com>

* Disable lockfile enforcement for now

Signed-off-by: Vasyl Gello <vasek.gello@gmail.com>

---------

Signed-off-by: Vasyl Gello <vasek.gello@gmail.com>

flutter/build_fdroid.sh

@@ -40,7 +40,7 @@ prepare_flutter() {
 
 	# Patch flutter
 
-	if dpkg --compare-versions "${VERSION}" ge "3.24.4"; then
+	if dpkg --compare-versions "${VERSION}" ge "3.24.4" && dpkg --compare-versions "${VERSION}" lt "3.44.0"; then
 		git apply "${ROOTDIR}/.github/patches/flutter_3.24.4_dropdown_menu_enableFilter.diff"
 	fi
 
@@ -324,11 +324,7 @@ prebuild)
 
 	# Install Flutter bridge version
 
-	# Unbraced on purpose: F-Droid recipes rewrite the braced form with sed to
-	# pin a version, but the bridge generator only works with the Flutter
-	# version bridge.yml uses
-
-	prepare_flutter "$FLUTTER_BRIDGE_VERSION" "${HOME}/flutter"
+	prepare_flutter "${FLUTTER_BRIDGE_VERSION}" "${HOME}/flutter"
 
 	# Save changes
 
@@ -346,7 +342,7 @@ prebuild)
 	pushd flutter
 
 	flutter clean
-	flutter packages pub get --enforce-lockfile
+	flutter packages pub get
 
 	popd # flutter