Enable multidex for androidTest of navigation-dynamic

Ensure that androidTest builds continue to work
as we approach the limit of a single dex file.

Test: ./gradlew bOS
Change-Id: I79a7f3651a5bc256fff448eaaaff5c70428c8080
diff --git a/navigation/navigation-dynamic-features-fragment/build.gradle b/navigation/navigation-dynamic-features-fragment/build.gradle
index 369f823..596d055 100644
--- a/navigation/navigation-dynamic-features-fragment/build.gradle
+++ b/navigation/navigation-dynamic-features-fragment/build.gradle
@@ -26,6 +26,12 @@
     id("kotlin-android")
 }
 
+android {
+    defaultConfig {
+        multiDexEnabled true
+    }
+}
+
 dependencies {
     api(project(":navigation:navigation-dynamic-features-runtime"))
     api(project(":navigation:navigation-fragment"))
@@ -46,6 +52,7 @@
     androidTestImplementation(ESPRESSO_CORE)
     androidTestImplementation(MOCKITO_CORE, excludes.bytebuddy)
     androidTestImplementation(TRUTH)
+    androidTestImplementation(MULTIDEX)
     androidTestImplementation(project(":internal-testutils-runtime"), {
         exclude group: "androidx.fragment", module: "fragment"
     })
diff --git a/navigation/navigation-dynamic-features-runtime/build.gradle b/navigation/navigation-dynamic-features-runtime/build.gradle
index e395526a..2b45ff2 100644
--- a/navigation/navigation-dynamic-features-runtime/build.gradle
+++ b/navigation/navigation-dynamic-features-runtime/build.gradle
@@ -26,6 +26,12 @@
     id("kotlin-android")
 }
 
+android {
+    defaultConfig {
+        multiDexEnabled true
+    }
+}
+
 dependencies {
     api(project(":navigation:navigation-runtime"))
     api(PLAY_CORE)
@@ -47,6 +53,7 @@
     androidTestImplementation(ESPRESSO_CORE)
     androidTestImplementation(MOCKITO_CORE, excludes.bytebuddy)
     androidTestImplementation(TRUTH)
+    androidTestImplementation(MULTIDEX)
 }
 
 androidx {