Wifi: Filter usable channels by Coex, Concurrency

Add ability to filter usable channel due to coex &
concurrency limitations. List of usable channels could
be limited due to coex restrictions and also due to
concurrency limitations & connection state.

Bug: 160212907
Test: VTS - VtsHalWifiV1_5TargetTest
Change-Id: Ic36b792b93fc4a6e328b9bc606a5286b8c1fd690
diff --git a/wifi/1.5/default/hidl_struct_util.cpp b/wifi/1.5/default/hidl_struct_util.cpp
index 7cee4cd..3c69da5 100644
--- a/wifi/1.5/default/hidl_struct_util.cpp
+++ b/wifi/1.5/default/hidl_struct_util.cpp
@@ -445,6 +445,20 @@
     return hidl_iface_mask;
 }
 
+uint32_t convertHidlUsableChannelFilterToLegacy(uint32_t hidl_filter_mask) {
+    uint32_t legacy_filter_mask = 0;
+    if (hidl_filter_mask &
+        IWifiChip::UsableChannelFilter::CELLULAR_COEXISTENCE) {
+        legacy_filter_mask |=
+            legacy_hal::WIFI_USABLE_CHANNEL_FILTER_CELLULAR_COEXISTENCE;
+    }
+    if (hidl_filter_mask & IWifiChip::UsableChannelFilter::CONCURRENCY) {
+        legacy_filter_mask |=
+            legacy_hal::WIFI_USABLE_CHANNEL_FILTER_CONCURRENCY;
+    }
+    return legacy_filter_mask;
+}
+
 bool convertLegacyWifiUsableChannelToHidl(
     const legacy_hal::wifi_usable_channel& legacy_usable_channel,
     V1_5::WifiUsableChannel* hidl_usable_channel) {