Make shouldBeSeamless an enum

We change theboolean shouldBeSemaless to an enum with
three values. This introduces a third value "Default" which
indicates that the layer doesn't have a preference for
seamlessness. This is the default value for Surfaces which
haven't called setFrameRate, or have called setFrameRate(0).

Bug: 161776961
Test: presubmit
Change-Id: I157e332e82e95badc928d6a8135e657cd6984db4
diff --git a/services/surfaceflinger/Scheduler/LayerHistory.cpp b/services/surfaceflinger/Scheduler/LayerHistory.cpp
index 28af930..359ee26 100644
--- a/services/surfaceflinger/Scheduler/LayerHistory.cpp
+++ b/services/surfaceflinger/Scheduler/LayerHistory.cpp
@@ -129,8 +129,7 @@
                         RefreshRateConfigs::LayerRequirement{.name = layer->getName(),
                                                              .vote = voteType,
                                                              .desiredRefreshRate = frameRate.rate,
-                                                             .shouldBeSeamless =
-                                                                     frameRate.shouldBeSeamless,
+                                                             .seamlessness = frameRate.seamlessness,
                                                              .weight = 1.0f,
                                                              .focused = layerFocused});
             } else if (recent) {
@@ -139,7 +138,8 @@
                                                              .vote = LayerVoteType::Heuristic,
                                                              .desiredRefreshRate =
                                                                      info->getRefreshRate(now),
-                                                             .shouldBeSeamless = true,
+                                                             .seamlessness =
+                                                                     Seamlessness::OnlySeamless,
                                                              .weight = 1.0f,
                                                              .focused = layerFocused});
             }