Add noexcept to move constructors and assignment operators.

Bug: 116614593
Test: build with WITH_TIDY=1
Change-Id: I47101c362198665194f8b3248751caaa7da32505
diff --git a/libs/vr/libvrflinger/hardware_composer.h b/libs/vr/libvrflinger/hardware_composer.h
index 1d8d463..539a7fb 100644
--- a/libs/vr/libvrflinger/hardware_composer.h
+++ b/libs/vr/libvrflinger/hardware_composer.h
@@ -86,8 +86,8 @@
         const std::shared_ptr<IonBuffer>& buffer, HWC::BlendMode blending,
         HWC::Composition composition_type, size_t z_order);
 
-  Layer(Layer&&);
-  Layer& operator=(Layer&&);
+  Layer(Layer&&) noexcept;
+  Layer& operator=(Layer&&) noexcept;
 
   ~Layer();