wifi(interface): Create 1.1 interface package

Extend the wifi HAL to add a new method in IWifiChip. This new method is
used for setting the TX power limit for meeting SAR requirements.

Bug: 62437848
Test: ./hardware/interfaces/update-makefiles.sh
Test: mmm -j32 hardware/interfaces/wifi/1.1
Change-Id: I8320a64812339f15cd88636505de0dfda18f0ebf
diff --git a/wifi/Android.bp b/wifi/Android.bp
index 523014f..230e720 100644
--- a/wifi/Android.bp
+++ b/wifi/Android.bp
@@ -2,6 +2,7 @@
 subdirs = [
     "1.0",
     "1.0/vts/functional",
+    "1.1",
     "offload/1.0",
     "offload/1.0/vts/functional",
     "supplicant/1.0",