Add color mode metric to ViewRootImpl

Log how long a window was in a particular color mode

Bug: 329475035
Flag: EXEMPT logging only
Test: builds
Change-Id: Idd2104f9aafe99954dba81f56691fb10a7405645
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index 23cd3ce..266c236 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -501,6 +501,13 @@
     ],
 }
 
+genrule {
+    name: "statslog-hwui-java-gen",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --java $(out) --module hwui --javaPackage com.android.os.coregraphics --javaClass HwuiStatsLog",
+    out: ["com/android/os/coregraphics/HwuiStatsLog.java"],
+}
+
 // ------------------------
 // library
 // ------------------------