add support for avif images

Fixes #138

android/build.gradle.kts

@@ -16,6 +16,23 @@ subprojects {
     project.layout.buildDirectory.value(newSubprojectBuildDir)
 }
 
+subprojects {
+    if (name == "flutter_avif_android") {
+        tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
+            exclude("**/FlutterAvifPlugin.kt")
+        }
+        afterEvaluate {
+            extensions.configure<com.android.build.api.dsl.LibraryExtension> {
+                compileSdk = 36
+                compileOptions {
+                    sourceCompatibility = JavaVersion.VERSION_21
+                    targetCompatibility = JavaVersion.VERSION_21
+                }
+            }
+        }
+    }
+}
+
 subprojects {
     project.evaluationDependsOn(":app")
 }