[CarPowerManager] Disable STR by default for everyone

Test: Manual
Bug: 121342851
Change-Id: I33ca5853938405a0e39d68a887ad5540bea210be
(cherry picked from commit 9e95d4f0027579cc84966b9d5ec4c7c8f8a466a6)
diff --git a/service/src/com/android/car/systeminterface/SystemStateInterface.java b/service/src/com/android/car/systeminterface/SystemStateInterface.java
index c963ac0..4b4aaef 100644
--- a/service/src/com/android/car/systeminterface/SystemStateInterface.java
+++ b/service/src/com/android/car/systeminterface/SystemStateInterface.java
@@ -58,7 +58,8 @@
 
     default boolean isSystemSupportingDeepSleep() {
         //TODO should return by checking some kernel suspend control sysfs, bug: 32061842
-        return true;
+        //TODO should be enabled for cars that support STR. b: 121342851
+        return false;
     }
 
     default List<ProcessInfo> getRunningProcesses() {