Clean up some build warnings

Bug: n/a
Test: n/a
Change-Id: I062e42f14bd1cfafc4a145956fc08ce9c91b2be6
diff --git a/system/hwc3/HostFrameComposer.cpp b/system/hwc3/HostFrameComposer.cpp
index d440b88..4d1167d 100644
--- a/system/hwc3/HostFrameComposer.cpp
+++ b/system/hwc3/HostFrameComposer.cpp
@@ -410,20 +410,21 @@
     if (!fallBackToClient) {
         for (const auto& layer : layers) {
             const auto& layerCompositionType = layer->getCompositionType();
+            const auto layerCompositionTypeString = toString(layerCompositionType);
 
             std::optional<Composition> layerFallBackTo = std::nullopt;
             switch (layerCompositionType) {
                 case Composition::CLIENT:
                 case Composition::SIDEBAND:
-                    ALOGV("%s: layer %" PRIu32 " CompositionType %d, fallback to client",
+                    ALOGV("%s: layer %" PRIu32 " CompositionType %s, fallback to client",
                           __FUNCTION__, static_cast<uint32_t>(layer->getId()),
-                          layerCompositionType);
+                          layerCompositionTypeString.c_str());
                     layerFallBackTo = Composition::CLIENT;
                     break;
                 case Composition::CURSOR:
-                    ALOGV("%s: layer %" PRIu32 " CompositionType %d, fallback to device",
+                    ALOGV("%s: layer %" PRIu32 " CompositionType %s, fallback to device",
                           __FUNCTION__, static_cast<uint32_t>(layer->getId()),
-                          layerCompositionType);
+                          layerCompositionTypeString.c_str());
                     layerFallBackTo = Composition::DEVICE;
                     break;
                 case Composition::INVALID:
@@ -432,8 +433,8 @@
                     layerFallBackTo = std::nullopt;
                     break;
                 default:
-                    ALOGE("%s: layer %" PRIu32 " has an unknown composition type: %d", __FUNCTION__,
-                          static_cast<uint32_t>(layer->getId()), layerCompositionType);
+                    ALOGE("%s: layer %" PRIu32 " has an unknown composition type: %s", __FUNCTION__,
+                          static_cast<uint32_t>(layer->getId()), layerCompositionTypeString.c_str());
             }
             if (layerFallBackTo == Composition::CLIENT) {
                 fallBackToClient = true;
@@ -447,7 +448,6 @@
     if (fallBackToClient) {
         changes.clear();
         for (auto& layer : layers) {
-            const auto& layerId = layer->getId();
             if (layer->getCompositionType() == Composition::INVALID) {
                 continue;
             }
@@ -558,15 +558,18 @@
 
         std::vector<int64_t> releaseLayerIds;
         for (auto layer : layers) {
+            const auto& layerCompositionType = layer->getCompositionType();
+            const auto layerCompositionTypeString = toString(layerCompositionType);
+
             // TODO: use local var composisitonType to store getCompositionType()
-            if (layer->getCompositionType() != Composition::DEVICE &&
-                layer->getCompositionType() != Composition::SOLID_COLOR) {
-                ALOGE("%s: Unsupported composition types %d layer %u", __FUNCTION__,
-                      layer->getCompositionType(), (uint32_t)layer->getId());
+            if (layerCompositionType != Composition::DEVICE &&
+                layerCompositionType != Composition::SOLID_COLOR) {
+                ALOGE("%s: Unsupported composition type %s layer %u", __FUNCTION__,
+                      layerCompositionTypeString.c_str(), (uint32_t)layer->getId());
                 continue;
             }
             // send layer composition command to host
-            if (layer->getCompositionType() == Composition::DEVICE) {
+            if (layerCompositionType == Composition::DEVICE) {
                 releaseLayerIds.emplace_back(layer->getId());
 
                 ::android::base::unique_fd fence = layer->getBuffer().getFence();
@@ -589,7 +592,7 @@
                 // solidcolor has no buffer
                 l->cbHandle = 0;
             }
-            l->composeMode = (hwc2_composition_t)layer->getCompositionType();
+            l->composeMode = (hwc2_composition_t)layerCompositionType;
             l->displayFrame = AsHwcRect(layer->getDisplayFrame());
             l->crop = AsHwcFrect(layer->getSourceCrop());
             l->blendMode = static_cast<int32_t>(layer->getBlendMode());