feat(sidecar): wire env map in DriverService + IosDriverBackend in Main

sidecar/src/main/kotlin/dev/sanderling/sidecar/DriverService.kt

@@ -30,7 +30,7 @@ class DriverService(
 
     override fun launch(request: LaunchRequest, responseObserver: StreamObserver<Empty>) {
         runRpc(responseObserver) {
-            backend.launch(request.bundleId, request.clearState)
+            backend.launch(request.bundleId, request.clearState, request.envMap)
             launchedBundleId.set(request.bundleId)
             Empty.getDefaultInstance()
         }

sidecar/src/main/kotlin/dev/sanderling/sidecar/Main.kt

@@ -44,11 +44,14 @@ fun main(arguments: Array<String>) {
     val serial = arguments.indexOf("--serial").let { index ->
         if (index >= 0 && index + 1 < arguments.size) arguments[index + 1] else null
     }
+    val udid = arguments.indexOf("--udid").let { index ->
+        if (index >= 0 && index + 1 < arguments.size) arguments[index + 1] else null
+    }
 
-    val backend: DriverBackend = if (platform == "android") {
-        MaestroDriverBackend(serial)
-    } else {
-        StubDriverBackend(platform)
+    val backend: DriverBackend = when (platform) {
+        "android" -> MaestroDriverBackend(serial)
+        "ios" -> IosDriverBackend(udid ?: error("--udid required for ios platform"))
+        else -> StubDriverBackend(platform)
     }
     val service = DriverService(platform = platform, backend = backend)
     val server = SidecarServer(port, service)