Squashed 'external/devlib/' changes from 914a9335..528d3d4e

528d3d4e target: Fix fallback path for kernel config loading
d6a2ed82 Teach the script to understand "dumpsys power" output from newer Android versions.
917800ff collector: ftrace: Use trace-cmd start --cmdlines-size
5671b49c collector: ftrace: Use trace-cmd start -C
27616813 collector: ftrace: Use trace-cmd start -b
cdceba59 bin: Update trace-cmd to 2.9.1
301d43d1 module/cgroups: Fix exclude pattern quoting
8b92f553 connection: Add BackgroundCommand.communicate()
ad5a97af connection: Add ParamikoBackgroundCommand.cmd attr for diagnostic
e231cb08 host: Fix PopenBackgroundCommand stdin
47280f63 connection: Fix race in ParamikoBackgroundCommand API
a6dd4ddb ssh: Flush writing end of pipes before closing
9c862483 target: Make Target.push/pull work with pathlib
dd7860d4 ssh: Move legacy scp out of SshConnectionBase

git-subtree-dir: external/devlib
git-subtree-split: 528d3d4e0fb41598c94d52f662cdf2ad0855c8a3