bootanimation: ensure that if a percent is shown, we'll get to 100.

Seeing 100 while booting is not finished, or seeing eg 90 while booting
is not finished isn't user-friendly.

Test: update ART module, see percent progress
Change-Id: I5509c83f661f937f00a7d28c789df509e3528a37
diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index b52222c..1b47fef 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -187,7 +187,8 @@
     void resizeSurface(int newWidth, int newHeight);
     void projectSceneToWindow();
 
-    bool shouldStopPlayingPart(const Animation::Part& part, int fadedFramesCount);
+    bool shouldStopPlayingPart(const Animation::Part& part, int fadedFramesCount,
+                               int lastDisplayedProgress);
     void checkExit();
 
     void handleViewport(nsecs_t timestep);