Add noexcept to move constructors and assignment operators.

Bug: 116614593
Test: build with WITH_TIDY=1
Change-Id: I47101c362198665194f8b3248751caaa7da32505
diff --git a/libs/vr/libbufferhub/ion_buffer.cpp b/libs/vr/libbufferhub/ion_buffer.cpp
index cbaa24a..1295531 100644
--- a/libs/vr/libbufferhub/ion_buffer.cpp
+++ b/libs/vr/libbufferhub/ion_buffer.cpp
@@ -49,11 +49,11 @@
   FreeHandle();
 }
 
-IonBuffer::IonBuffer(IonBuffer&& other) : IonBuffer() {
+IonBuffer::IonBuffer(IonBuffer&& other) noexcept : IonBuffer() {
   *this = std::move(other);
 }
 
-IonBuffer& IonBuffer::operator=(IonBuffer&& other) {
+IonBuffer& IonBuffer::operator=(IonBuffer&& other) noexcept {
   ALOGD_IF(TRACE, "IonBuffer::operator=: handle_=%p other.handle_=%p", handle(),
            other.handle());