Stop using SO_SNDBUFFORCE

Use SO_SNDBUF which doesn't require CAP_NET_ADMIN instead.
Change the value of kFuseMaxWrite to 128KB.

In the kernel code, there is a constant FUSE_MAX_PAGES_PER_REQ which
limits the size of requests to 128KB.

Bug: 74725300
Test: atest android.os.storage.cts.StorageManagerTest

Change-Id: Ic3a8f1a7378d027a6c0ee054cedc2c9f4b7509ad