Fix up build after upstream change.

Follow up to aosp/940071

Test: ./gradlew tasks && ./gradlew :camera:integration-tests:camera-testapp-core:assembleDebug
Change-Id: I5445465f5ed43371572946e101e05d9d232a5f6b
diff --git a/camera/extensions/build.gradle b/camera/extensions/build.gradle
index 136938e..c96ff80 100644
--- a/camera/extensions/build.gradle
+++ b/camera/extensions/build.gradle
@@ -20,7 +20,8 @@
 import androidx.build.UnpublishedLibraryGroups
 
 plugins {
-    id("SupportAndroidLibraryPlugin")
+    id("AndroidXPlugin")
+    id("com.android.library")
 }
 
 dependencies {