Android overhaul: one configureAndroidModule for the application and library plugins; coil-compose out of :app

AndroidApplicationPlugin and AndroidLibraryPlugin repeated the SDK levels, Java 17, unit-test resources, lint, Kotlin,
Robolectric JVM and JUnit set-up; both call configureAndroidModule(CommonExtension) now (the gate's task inputs did
not change: every test task stayed up to date). :app imports nothing from coil-compose; it still arrives through
:core:design, so the runtime classpaths are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/app/build.gradle.kts

@@ -92,5 +92,4 @@ dependencies {
     implementation(libs.kotlinx.coroutines.core)
     implementation(libs.kotlinx.datetime)
     implementation(libs.coil)
-    implementation(libs.coil.compose)
 }