iorapd depends on pm in system_server, so turn it off too when we
turn off system_server with the 'stop' command.
Bug: 153964298
Test: adb shell stop
Test: adb shell start
Change-Id: I08390472b1e1b969d0380843efa1bbd35b194250
Move these from toybox as they're Android specific and more easily
maintained here.
A few changes during the conversion:
* Report error in setprop if value is not a UTF8 string; this would
previously fail only after attempting to set the property
* Inform users to check dmesg for further failure messages for all
three programs
* Only start/stop zygote_secondary if the device is not single arch
Bug: 117321744
Bug: 133901248
Test: setprop works, start and stop work on single and multi-arch.
Change-Id: Id2194cf2b65221bde38aff91f0e86b33edb37f42
