Revert "Revert "don't use /cache/dalvik-cache for now""

This reverts commit 6f8e88ca6e2b545fdc585b2c987606cb54facb8d.
Revert "Revert "Revert "don't use /cache/dalvik-cache for now"""

This reverts commit 1c6540fff1cd25a6a8c058d4ec3c7c80e0e1ac90.
Revert "add hardware info"

This reverts commit 8661cf4dcfab18db44378d4801c0bd4abdcaec19.