base: adb.exe build error

Windows build of adb is broken because of the lack of
std::chrono_literals and for an implementation of
android::boot_clock::now().

Test: make -j vts
Bug: 72941624
Change-Id: Ie65fed098633eb45a94ea553de6903f8d55fc5b2
diff --git a/base/chrono_utils.cpp b/base/chrono_utils.cpp
index dbe5483..19080a5 100644
--- a/base/chrono_utils.cpp
+++ b/base/chrono_utils.cpp
@@ -28,7 +28,7 @@
   return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
                                 std::chrono::nanoseconds(ts.tv_nsec));
 #else
-  // Darwin does not support clock_gettime.
+  // Darwin and Windows do not support clock_gettime.
   return boot_clock::time_point();
 #endif  // __linux__
 }