Roll engine 202f2006df38..b1c51cfe7870 (2 commits) (#55350)

* e83f30c59 Pass amber-files directory to tests. (flutter/engine#17815)

* b1c51cfe7 Extend external view embedder on Android (flutter/engine#17839)

bin/internal/engine.version

diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index e00952d..8e4d288 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-202f2006df38d4411871d182eb5ddc05d0546b50
+b1c51cfe787087b2ae6d37e884c571fe7d846c56