feat: update to alpha.17, typed mobile plugin IPC arguments (#676)

Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

shared/template/android/src/main/java/ExamplePlugin.kt

@@ -6,18 +6,27 @@ package {{android_package_id}}
 
 import android.app.Activity
 import app.tauri.annotation.Command
+import app.tauri.annotation.InvokeArg
 import app.tauri.annotation.TauriPlugin
 import app.tauri.plugin.JSObject
 import app.tauri.plugin.Plugin
 import app.tauri.plugin.Invoke
 
+@InvokeArg
+class PingArgs {
+  var value: String? = null
+}
+
 @TauriPlugin
 class ExamplePlugin(private val activity: Activity): Plugin(activity) {
+    private val implementation = Example()
+
     @Command
     fun ping(invoke: Invoke) {
-        val value = invoke.getString("value") ?: ""
+        val args = invoke.parseArgs(PingArgs::class.java)
+
         val ret = JSObject()
-        ret.put("value", value)
+        ret.put("value", implementation.pong(args.value ?: "default value :("))
         invoke.resolve(ret)
     }
 }