[gradle] fix warnings & update deps (#189)

Signed-off-by: crueter <swurl@swurl.xyz>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/189
Co-authored-by: crueter <swurl@swurl.xyz>
Co-committed-by: crueter <swurl@swurl.xyz>

src/android/gradle.properties

@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2025 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 # SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -14,7 +17,5 @@ android.useAndroidX=true
 # Kotlin code style for this project: "official" or "obsolete":
 kotlin.code.style=official
 kotlin.parallel.tasks.in.project=true
-android.defaults.buildfeatures.buildconfig=true
-
 # Android Gradle plugin 8.0.2
 android.suppressUnsupportedCompileSdk=34