Edit trace to start with "draw"

This is to fix the tracing test that is looking for a draw trace

Bug: 306589452
Test: AtraceHostTest
Change-Id: I14eb17861028cc7d492963af15479246d85c42ac
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index a7b3c10..8df022a 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -4792,7 +4792,7 @@
         mFullRedrawNeeded = false;
 
         mIsDrawing = true;
-        Trace.traceBegin(Trace.TRACE_TAG_VIEW, mTag + "-draw");
+        Trace.traceBegin(Trace.TRACE_TAG_VIEW, "draw-" + mTag);
 
         addFrameCommitCallbackIfNeeded();