Android build system upgrades

* Upgrade Gradle plugin to 8.2.0
* Upgrade Gradle to 8.5
* Upgrade NDK to 26.1
* Move `buildFeatures` to Gradle build file, since using flag in
`gradle.properties` is deprecated

android-project/app/build.gradle

@@ -7,7 +7,7 @@ if (buildAsApplication) {
 }
 
 android {
-	ndkVersion '26.0.10792818'
+	ndkVersion '26.1.10909125'
 	compileSdk 33
 	defaultConfig {
 		if (buildAsApplication) {
@@ -31,6 +31,9 @@ android {
 		}
 	}
 	namespace 'org.diasurgical.devilutionx'
+	buildFeatures {
+		buildConfig true
+	}
 	applicationVariants.all { variant ->
 		tasks["merge${variant.name.capitalize()}Assets"]
 			.dependsOn("externalNativeBuild${variant.name.capitalize()}")

android-project/gradle.properties

@@ -1,3 +1,2 @@
-android.defaults.buildfeatures.buildconfig=true
 android.nonFinalResIds=false
 android.nonTransitiveRClass=false