Implement Rust-owned Android Keystore secure storage (#93)

android/platform/build.gradle.kts

@@ -12,11 +12,13 @@ android {
             .toInt()
     ndkVersion = libs.versions.ndk.get()
     defaultConfig {
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         minSdk =
             libs.versions.minSdk
                 .get()
                 .toInt()
     }
+    testOptions { targetSdk = libs.versions.compileSdk.get().toInt() }
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
@@ -35,5 +37,9 @@ kotlin {
 
 dependencies {
     implementation(project(":core"))
+    implementation(libs.biometric)
+    implementation(libs.fragment)
     testImplementation(libs.junit)
+    androidTestImplementation(libs.android.test.runner)
+    androidTestImplementation(libs.android.test.core)
 }