Add unit tests for Java adapters.

Add unit tests for java adapters.

Bug: 238767712
Test: ./gradlew window:window-java:test
Test: run tests with coverage.
Change-Id: I29ddf5bd006a9c584da714f8587fa5b6eccf254d
diff --git a/window/window-java/build.gradle b/window/window-java/build.gradle
index eab48f6..eb27a1f 100644
--- a/window/window-java/build.gradle
+++ b/window/window-java/build.gradle
@@ -30,6 +30,13 @@
     api(project(":window:window"))
     implementation("androidx.core:core:1.3.2")
 
+    testImplementation(libs.testCore)
+    testImplementation(libs.testRunner)
+    testImplementation(libs.junit)
+    testImplementation(libs.mockitoCore)
+    testImplementation(libs.mockitoKotlin)
+    testImplementation(libs.kotlinCoroutinesTest)
+
     androidTestImplementation(libs.testExtJunit)
     androidTestImplementation(libs.testRunner)
     androidTestImplementation(libs.testRules)