Revert^2 "Harden construction sites of android::StrongPointer."

This reverts commit f73db7a6242e297ead71df0d0d1fb3a8515245d3.

Reason for revert: Scope restricted to sp<>::make which is a safe
replacement for assignment from new.

Bug: 393217449
Test: ChoreographerTests pass locally.
Flag: EXEMPT_refactor

Change-Id: I9a38c54c06cc64da099d282c05ccf20f40b70a72
diff --git a/libs/gui/BufferItem.cpp b/libs/gui/BufferItem.cpp
index 3b2d337..9dcd5dc 100644
--- a/libs/gui/BufferItem.cpp
+++ b/libs/gui/BufferItem.cpp
@@ -215,14 +215,14 @@
     FlattenableUtils::read(buffer, size, flags);
 
     if (flags & 1) {
-        mGraphicBuffer = new GraphicBuffer();
+        mGraphicBuffer = sp<GraphicBuffer>::make();
         status_t err = mGraphicBuffer->unflatten(buffer, size, fds, count);
         if (err) return err;
         size -= FlattenableUtils::align<4>(buffer);
     }
 
     if (flags & 2) {
-        mFence = new Fence();
+        mFence = sp<Fence>::make();
         status_t err = mFence->unflatten(buffer, size, fds, count);
         if (err) return err;
         size -= FlattenableUtils::align<4>(buffer);