SF: Remove conditional lock in setPowerMode

The mCurrentState access in setPowerModeInternal was only for looking up
the sequence ID of the display.

Bug: 74619554
Test: Boot
Change-Id: If0fad8f19bf8680f247476c3ffe52667e061fdd3
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index 63216a9..4da08b8 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -227,9 +227,8 @@
 
     auto onInitializeDisplays() { return mFlinger->onInitializeDisplays(); }
 
-    auto setPowerModeInternal(const sp<DisplayDevice>& display, int mode,
-                              bool stateLockHeld = false) {
-        return mFlinger->setPowerModeInternal(display, mode, stateLockHeld);
+    auto setPowerModeInternal(const sp<DisplayDevice>& display, int mode) {
+        return mFlinger->setPowerModeInternal(display, mode);
     }
 
     auto onMessageReceived(int32_t what) { return mFlinger->onMessageReceived(what); }