Let lint analysis the module :appconfig.

We had this warning:
Lint will treat :appconfig as an external dependency and not analyze it.
 * Recommended Action: Apply the 'com.android.lint' plugin to java library project :appconfig. to enable lint to analyze those sources.

appconfig/build.gradle.kts

@@ -15,6 +15,7 @@
  */
 plugins {
     id("java-library")
+    id("com.android.lint")
     alias(libs.plugins.kotlin.jvm)
     alias(libs.plugins.anvil)
     alias(libs.plugins.ksp)