Squashed 'external/devlib/' changes from 22a5945460b1..f65130b7c7ec

f65130b7c7ec target: Introduce TypedKernelConfig
5b51c2644eab target: Introduce KernelConfigKeyError
a752f559562c target: Fix KernelConfig parsing
781f9b068df5 target: Move kernel config parsing in method
7e79eeb9cb81 target: Robustify read_tree_values()
911a9f2ef4fd utils/ssh: Implement work around for issue in pexpect
cc0679e40fbd module: sched: add support to get/set scheduler features
5dea9f8bcfef module: sched: add get/set methods for scheduler attributes
a9ee41855d97 GfxInfo: Update to use nano second measurments
c13e3c260b9f instrument/measurment_types: Add nanoseconds
aabb74c8cb80 utils/rendering: Fix compatibility with Python3
a4c22cef7102 utils/rendering: Fix incorrect debug message
3da7fbc9ddfa utils/rendering: Fix default value
f2a87ce61c42 utils.android.ApkInfo: Retrieve APK class methods
2b6cb264cffc utils.android.ApkInfo: Add reading activity names
7e0e6e8706e4 utils.android: Add ApkInfo._run()
4fabcae0b4e8 cgroups.py: strip slashes, don't drop first char this makes it cope with both, names starting with or without slashes
3c4a282c29fa devlib/version: Update to development version
683da92067bb devlib: Version Bump to v1.1
1569be9ba7e6 trace/serial_trace: Ensure markers are encoded to before writing.
f1b7fd184a5d module/cgroups: Execute command as root when launching cmd in cgroup

git-subtree-dir: external/devlib
git-subtree-split: f65130b7c7ecccfe2006e40d2735eeb86639772b