Add noexcept to move constructors and assignment operators.

Bug: 116614593
Test: build with WITH_TIDY=1
Change-Id: Ic3993d88eb3066aef402d74c4d543c56a1dfd5c3
diff --git a/tools/aapt2/util/ImmutableMap.h b/tools/aapt2/util/ImmutableMap.h
index 59858e4..1727b18 100644
--- a/tools/aapt2/util/ImmutableMap.h
+++ b/tools/aapt2/util/ImmutableMap.h
@@ -32,8 +32,8 @@
   using const_iterator =
       typename std::vector<std::pair<TKey, TValue>>::const_iterator;
 
-  ImmutableMap(ImmutableMap&&) = default;
-  ImmutableMap& operator=(ImmutableMap&&) = default;
+  ImmutableMap(ImmutableMap&&) noexcept = default;
+  ImmutableMap& operator=(ImmutableMap&&) noexcept = default;
 
   static ImmutableMap<TKey, TValue> CreatePreSorted(
       std::initializer_list<std::pair<TKey, TValue>> list) {