CE: Reduce scope of where -Wconversion is disabled

The local conversion warning have been addressed, and the only remaining
conversion warnings are in some of the header files that are included,
directly or indirectly.

Test: Builds
Bug: 129481165
Change-Id: If6b7b9055b17ef67872bb5e34a0ef090b1e1a768
diff --git a/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp b/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
index 030c703..aeaa18a 100644
--- a/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
@@ -14,21 +14,25 @@
  * limitations under the License.
  */
 
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wconversion"
-
 #include <compositionengine/CompositionRefreshArgs.h>
 #include <compositionengine/LayerFE.h>
 #include <compositionengine/OutputLayer.h>
 #include <compositionengine/impl/CompositionEngine.h>
 #include <compositionengine/impl/Display.h>
 #include <compositionengine/impl/Layer.h>
+
 #include <renderengine/RenderEngine.h>
 #include <utils/Trace.h>
 
+// TODO(b/129481165): remove the #pragma below and fix conversion issues
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+
 #include "DisplayHardware/HWComposer.h"
 
+// TODO(b/129481165): remove the #pragma below and fix conversion issues
+#pragma clang diagnostic pop // ignored "-Wconversion"
+
 namespace android::compositionengine {
 
 CompositionEngine::~CompositionEngine() = default;
@@ -159,6 +163,3 @@
 
 } // namespace impl
 } // namespace android::compositionengine
-
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic pop // ignored "-Wconversion"