fix: Set correct namespace in build.gradle (#2104)

* fix: set correct namespace in build.gradle

* chore: refactor Android project for compatibility with multiple Gradle versions

---------

Co-authored-by: Marc Rousavy <me@mrousavy.com>

package/android/build.gradle

@@ -1,4 +1,8 @@
 import java.nio.file.Paths
+import com.android.Version
+
+def agpVersion = Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0].toInteger()
+def androidManifestPath = agpVersion >= 7 ? 'src/main/AndroidManifest.xml' : 'src/hasNamespace/AndroidManifest.xml'
 
 buildscript {
   def kotlin_version = rootProject.ext.has("kotlinVersion") ? rootProject.ext.get("kotlinVersion") : project.properties["VisionCamera_kotlinVersion"]
@@ -73,7 +77,9 @@ repositories {
 }
 
 android {
-  namespace "com.mrousavy.camera"
+  if (agpVersion >= 7) {
+    namespace "com.mrousavy.camera"
+  }
 
   // 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)
@@ -107,6 +113,12 @@ android {
     }
   }
 
+  sourceSets {
+    main {
+      manifest.srcFile androidManifestPath
+    }
+  }
+
   compileOptions {
     sourceCompatibility JavaVersion.VERSION_1_8
     targetCompatibility JavaVersion.VERSION_1_8