Remove RenderThread from EglManager

Refactor to make EglManager re-usable.

Test: hwuiunit passes, hwuimacro works

Change-Id: Ie8e9398c703fada1dc5d8baca5f42485eadea202
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 95ca8d9..a36dae4 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -552,7 +552,7 @@
     ATRACE_CALL();
     if (level >= TRIM_MEMORY_COMPLETE) {
         thread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::Complete);
-        thread.eglManager().destroy();
+        thread.destroyGlContext();
         thread.vulkanManager().destroy();
     } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
         thread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::UiHidden);