build: update minSdk to 23

Author: Myshkouski

TvMaterialCatalog/app/build.gradle.kts

@@ -14,7 +14,7 @@ android {
 
     defaultConfig {
         applicationId = "com.google.tv.material.catalog"
-        minSdk = 21
+        minSdk = 23
         targetSdk = 35
         versionCode = 1
         versionName = "1.0"
@@ -59,4 +59,6 @@ dependencies {
     implementation(libs.tv.material)
     implementation(libs.coil.compose)
     implementation(libs.navigation.compose)
+    implementation(libs.ui.tooling.preview)
+    debugImplementation(libs.ui.tooling)
 }