Surface: Initialize mAutoPrerotation

Hoping to fix the remaining buffer rejection issues. BBQ was
rejecting all buffers coming from a rotated app. The logs
indicated this was because Surface and BufferQueue
autoPreRotation state was mismatched, resulting
in BufferQueue dequeueing buffers of the wrong size.

Test: presubmit
Bug: 191841127
Change-Id: I84b6b8c372b49e885e5831155f8a37ae7404e6d7
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 821ec16..2edb4e4 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -70,6 +70,7 @@
         mGenerationNumber(0),
         mSharedBufferMode(false),
         mAutoRefresh(false),
+        mAutoPrerotation(false),
         mSharedBufferSlot(BufferItem::INVALID_BUFFER_SLOT),
         mSharedBufferHasBeenQueued(false),
         mQueriedSupportedTimestamps(false),