Check for mIdleTimer instead of fatal log

If there is no idle timer, there should be no action instead of fatal
logging.

Bug: 354616723
Test: atest libsurfaceflinger_unittest
Test: presubmit
Flag: EXEMPT_bugfix
Change-Id: I22bcfdc5c64185b9fc83dc0e8830c8bcfa52756f
diff --git a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
index 9f6eab2..c484df3 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
@@ -1394,13 +1394,14 @@
         const auto& idleScreenConfigOpt = getCurrentPolicyLocked()->idleScreenConfigOpt;
         if (idleScreenConfigOpt != oldPolicy.idleScreenConfigOpt) {
             if (!idleScreenConfigOpt.has_value()) {
-                // fallback to legacy timer if existed, otherwise pause the old timer
-                LOG_ALWAYS_FATAL_IF(!mIdleTimer);
-                if (mConfig.legacyIdleTimerTimeout > 0ms) {
-                    mIdleTimer->setInterval(mConfig.legacyIdleTimerTimeout);
-                    mIdleTimer->resume();
-                } else {
-                    mIdleTimer->pause();
+                if (mIdleTimer) {
+                    // fallback to legacy timer if existed, otherwise pause the old timer
+                    if (mConfig.legacyIdleTimerTimeout > 0ms) {
+                        mIdleTimer->setInterval(mConfig.legacyIdleTimerTimeout);
+                        mIdleTimer->resume();
+                    } else {
+                        mIdleTimer->pause();
+                    }
                 }
             } else if (idleScreenConfigOpt->timeoutMillis > 0) {
                 // create a new timer or reconfigure