Merge "Revert "Call preserveSurfaces when detaching children."" into rvc-dev am: 3affbe4d9f am: c3e5f8315a am: fc68945868
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12180365 Change-Id: I1b3a9f5e8404a0d970d6a7bbb85dbc2cbf838985
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