graphics/mesa-devel: unbreak with --auto-features=enabled

meson.build:792:0: ERROR: Feature android-libbacktrace cannot be enabled: -D android-libbacktrace=enabled makes no sense without -D platforms=android
meson.build:1783:0: ERROR: Dependency "valgrind" not found, tried pkgconfig
meson.build:2018:0: ERROR: C shared or static library 'sensors' not found

PR: 270361