CDD: Update Wi-Fi Direct concurrency requirements

Update Wi-Fi Direct concurrency requirements from SHOULD to MUST.
This reflects the effective state of the requirement based on CTS.
Ecosystem already implements this behavior.

Bug: 111088432
Test: N/A
Change-Id: I455483957b5fbcd6f3b606f52db892cf44c9abc0
diff --git a/7_hardware-compatibility/7_4_data-connectivity.md b/7_hardware-compatibility/7_4_data-connectivity.md
index 6f823fa..d663090 100644
--- a/7_hardware-compatibility/7_4_data-connectivity.md
+++ b/7_hardware-compatibility/7_4_data-connectivity.md
@@ -116,7 +116,7 @@
     as described in the SDK documentation.
 *   [C-1-2] MUST report the hardware feature `android.hardware.wifi.direct`.
 *   [C-1-3] MUST support regular Wi-Fi operation.
-*   SHOULD support Wi-Fi and Wi-Fi Direct operations concurrently.
+*   [C-1-4] MUST support Wi-Fi and Wi-Fi Direct operations concurrently.
 
 #### 7.4.2.2\. Wi-Fi Tunneled Direct Link Setup