watchdog: Add a function to tell us if the timer is running

This helps us refactor some of our existing code and will be useful for
future changes.

Change-Id: Ifa1547f09997d6824f726fc5f46e15eed4c1e8c1
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/watchdog.cpp b/watchdog.cpp
index b5cae66..12631a6 100644
--- a/watchdog.cpp
+++ b/watchdog.cpp
@@ -50,7 +50,7 @@
     uint64_t timeRemain = 0;
 
     // timer may have already expired and disabled
-    if (timer.getEnabled() != SD_EVENT_OFF)
+    if (timerEnabled())
     {
         // the one-shot timer does not expire yet
         auto expiry = duration_cast<milliseconds>(
@@ -71,7 +71,7 @@
 // Reset the timer to a new expiration value
 uint64_t Watchdog::timeRemaining(uint64_t value)
 {
-    if (timer.getEnabled() == SD_EVENT_OFF)
+    if (!timerEnabled())
     {
         // We don't need to update the timer because it is off
         return 0;