Add flag l2cap_p_ccb_check_rewrite

Bug: 326686472
Bug: 315241296
Test: mma packages/modules/Bluetooth
Flag: EXEMPT add new flag
Change-Id: I0099bbe852cc66614c8bb4bf78581b09a0357b43

flags/l2cap.aconfig

@@ -7,3 +7,10 @@ flag {
     description: "Provide l2cap transmit complete information b/301168932"
     bug: "314819704"
 }
+
+flag {
+    name: "l2cap_p_ccb_check_rewrite"
+    namespace: "bluetooth"
+    description: "Rewrite logic of p_ccb check in l2c_link_sec_comp"
+    bug: "326686472"
+}