sdk: Try getting LineageHardwareService again before checking for it

Currently if LineageHardwareManager couldn't get LineageHardwareService
on its first try, it stays disconnected and wouldn't retry in time.
Several one-time isSupported() checks during boot would then fail,
resulting in missing features e.g. HWC2-based LiveDisplay.

Change-Id: I85e6866543798ed4a805db5c99a28ef8a39335cc

sdk/src/java/lineageos/hardware/LineageHardwareManager.java

@@ -807,6 +807,7 @@ public final class LineageHardwareManager {
      * @return true if service is valid
      */
     private boolean checkService() {
+        sService = getService();
         if (sService == null) {
             Log.w(TAG, "not connected to LineageHardwareManagerService");
             return false;