Move annotations-experimental dependency to project or artifact

Bug: n/a
Test: ./gradlew :room:room-runtime:cC
Change-Id: I2cdb729539684a97d6579d96299bb568afa04a2c
diff --git a/room/runtime/build.gradle b/room/runtime/build.gradle
index 2d0c65c..3a1ef2b 100644
--- a/room/runtime/build.gradle
+++ b/room/runtime/build.gradle
@@ -42,7 +42,7 @@
     implementation("androidx.arch.core:core-runtime:2.0.1")
     compileOnly(projectOrArtifact(":paging:paging-common"))
     compileOnly("androidx.lifecycle:lifecycle-livedata-core:2.0.0")
-    implementation project(":annotation:annotation-experimental")
+    implementation projectOrArtifact(":annotation:annotation-experimental")
 
     testImplementation("androidx.arch.core:core-testing:2.0.1")
     testImplementation(JUNIT)