Update resetprop to support --compact

[aviraxp]

This allows compacting property area to remove holes after deleting prop. Usage:

resetprop --compact
resetprop -c
resetprop -c u:object_r:ab_update_gki_prop:s0

[yujincheng08]

LGTM

[Copilot]

Pull request overview

Adds support for compacting the Android system property area via resetprop --compact, wiring a new CLI switch to a new low-level system_properties entry point.

Changes:

• Bumps the system_properties external subproject to a revision that exposes a compaction API.
• Adds an FFI binding and SysProp::compact() wrapper for __system_property_compact.
• Introduces -c/--compact in resetprop CLI and routes execution through the new compaction path.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
native/src/external/system_properties	Updates the system_properties subproject revision to pick up the underlying compaction support.
native/src/core/resetprop/mod.rs	Adds FFI + wrapper method for calling the property-area compaction routine.
native/src/core/resetprop/cli.rs	Adds --compact flag and execution path to trigger compaction from the CLI.

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[aviraxp]

Test pass on a16