Remove GrAtlasManager.h from all other .h files

Having GrAtlasManager.h in GrContextPriv.h was needlessly propagating dependence on that header.

Change-Id: Idf5836f1e217ecd2da91f751b488a63a884c02ce
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281739
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
diff --git a/tests/GrMipMappedTest.cpp b/tests/GrMipMappedTest.cpp
index c9f43f8..0268701 100644
--- a/tests/GrMipMappedTest.cpp
+++ b/tests/GrMipMappedTest.cpp
@@ -16,6 +16,7 @@
 #include "src/gpu/GrContextPriv.h"
 #include "src/gpu/GrDrawingManager.h"
 #include "src/gpu/GrGpu.h"
+#include "src/gpu/GrProxyProvider.h"
 #include "src/gpu/GrRecordingContextPriv.h"
 #include "src/gpu/GrRenderTargetContext.h"
 #include "src/gpu/GrSemaphore.h"