chore(Android): remove unnecesary check in Android build code (#2608)

## Description

Since 0.72 RN uses AGP 7.4.x (see #2603) and we do not support any older
versions.

## Changes

Removed the check and merged both `buildFeature`s


## Test code and steps to reproduce

Passing Android build

## Checklist

- [x] Ensured that CI passes

android/build.gradle

@@ -101,13 +101,6 @@ android {
     compileSdkVersion safeExtGet('compileSdkVersion', rnsDefaultCompileSdkVersion)
     namespace "com.swmansion.rnscreens"
 
-    def agpVersion = Version.ANDROID_GRADLE_PLUGIN_VERSION
-    if (agpVersion.tokenize('.')[0].toInteger() >= 7) {
-        buildFeatures {
-            buildConfig true
-        }
-    }
-
     // Used to override the NDK path/version on internal CI or by allowing
     // users to customize the NDK path/version from their root project (e.g. for M1 support)
     if (rootProject.hasProperty("ndkPath")) {
@@ -135,6 +128,7 @@ android {
     }
     buildFeatures {
         prefab true
+        buildConfig true
     }
     externalNativeBuild {
         cmake {