Let Agent ask the user during planning

Co-authored-by: Codex <noreply@openai.com>

android/app/src/main/java/com/openai/codexd/MainActivity.kt

@@ -188,6 +188,9 @@ class MainActivity : Activity() {
                     targetPackageOverride = targetPackageOverride.ifBlank { null },
                     allowDetachedMode = true,
                     sessionController = agentSessionController,
+                    requestUserInputHandler = { questions ->
+                        AgentUserInputPrompter.promptForAnswers(this, questions)
+                    },
                 )
             }
             result.onFailure { err ->