Update language to comply with Android's inclusive language guidance.

See https://source.android.com/setup/contribute/respectful-code
for reference.

Bug: 161896447
Test: run simpleperf_unit_test.
Change-Id: Ib9599bba6cd3a7857c01c11f1a7b862f007dab6e
diff --git a/simpleperf/nonlinux_support/nonlinux_support.cpp b/simpleperf/nonlinux_support/nonlinux_support.cpp
index deb3b1d..b813109 100644
--- a/simpleperf/nonlinux_support/nonlinux_support.cpp
+++ b/simpleperf/nonlinux_support/nonlinux_support.cpp
@@ -45,7 +45,7 @@
 
 namespace simpleperf {
 
-class DummyOfflineUnwinder : public OfflineUnwinder {
+class NoOpOfflineUnwinder : public OfflineUnwinder {
  public:
   bool UnwindCallChain(const ThreadEntry&, const RegSet&, const char*, size_t,
                        std::vector<uint64_t>*, std::vector<uint64_t>*) override {
@@ -54,7 +54,7 @@
 };
 
 std::unique_ptr<OfflineUnwinder> OfflineUnwinder::Create(bool) {
-  return std::unique_ptr<OfflineUnwinder>(new DummyOfflineUnwinder);
+  return std::unique_ptr<OfflineUnwinder>(new NoOpOfflineUnwinder);
 }
 
 }  // namespace simpleperf
\ No newline at end of file