Establish native Linux ARM64 Android CI and verification gates (#94)

android/app/build.gradle.kts

@@ -18,7 +18,7 @@ android {
         versionCode = 1
         versionName = "1.0.1"
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
-        ndk { abiFilters += listOf("arm64-v8a", "armeabi-v7a", "x86_64") }
+        ndk { abiFilters += listOf("arm64-v8a", "armeabi-v7a") }
     }
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
@@ -41,12 +41,17 @@ android {
     lint {
         abortOnError = true
         warningsAsErrors = true
+        // The user scoped this milestone to ARM Android; x86 ChromeOS is excluded.
+        disable += "ChromeOsAbiSupport"
     }
 }
 
 kotlin {
     jvmToolchain(25)
-    compilerOptions { jvmTarget.set(JvmTarget.JVM_17) }
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
+        allWarningsAsErrors.set(true)
+    }
 }
 
 dependencies {
@@ -69,7 +74,6 @@ dependencies {
     androidTestImplementation(libs.compose.ui.test)
     androidTestImplementation(libs.android.test.runner)
     androidTestImplementation(libs.android.test.espresso)
-    debugImplementation(libs.compose.ui.test.manifest)
     implementation(libs.coroutines.android)
     testImplementation(libs.coroutines.test)
     testImplementation(libs.junit)