x11/gromit-mpx: Update to 1.9.0

• Change depends from libappindicator to libayatana-appindicator
• Port cleanup
• Take maintainership

ChangeLog: https://github.com/bk138/gromit-mpx/releases/tag/1.9.0

		https://github.com/bk138/gromit-mpx/releases/tag/1.8.0

MFH: 2026Q2
(cherry picked from commit def8df032d60979c2d7f914c9153248f2ae2fa4e)