SF: Rename RefreshRateConfigs

"Configs" is vague and overloaded, and collections thereof cannot simply
pluralize the name. Also, update the stale class comment.

Bug: 241285191
Test: Build
Change-Id: I3b6d2259dcaa390f44c07caa07c05361c6cb428b
diff --git a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
index dfcfd91..6adcd52 100644
--- a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
@@ -383,8 +383,8 @@
     history.record(parent.get(), 0, 0, LayerHistory::LayerUpdateType::Buffer);
     history.record(child.get(), 0, 0, LayerHistory::LayerUpdateType::Buffer);
 
-    const auto configs = mFlinger.mutableScheduler().refreshRateConfigs();
-    const auto summary = history.summarize(*configs, 0);
+    const auto selectorPtr = mFlinger.mutableScheduler().refreshRateSelector();
+    const auto summary = history.summarize(*selectorPtr, 0);
 
     ASSERT_EQ(2u, summary.size());
     EXPECT_EQ(FRAME_RATE_VOTE1.rate, summary[0].desiredRefreshRate);