Create a fallback to install from fuse if mmap fails

We may fail to memory map the package on 32 bit builds for packages with
2GiB+ size. This cl tries to install the package with fuse when memory map
fails in such cases.

Bug: 127071893
Test: build 32 bit version sailfish, push package and block.map, reboot into recovery with
the corresponding update_package argument.

Change-Id: I5dae4f3e27ccaf8d64ff3657d36f0e75db2330b0