recovery: Clean up try_update_binary() in install.cpp.

Move functions over to android::base versions.
- strtok(3) => android::base::Split()
- strtol(3) => android::base::ParseInt()
- strtof(3) => android::base::ParseDouble()

Test: Build recovery image and apply a package that calls ui_print /
      progress / set_progress commands.
Change-Id: I953b4985e0bd9e277362ae53e233d755cf27d80c