proximity: Only use proximity sensor on active calls

See Librem5/calls#175

Signed-off-by: Guido Günther <guido.gunther@puri.sm>
11 jobs for calls in 51 minutes and 50 seconds (queued for 35 minutes and 48 seconds)
Status Job ID Name Coverage
  Build
passed #342148
librem5
build:cross-debian-bullseye:i386

00:13:30

passed #342149
librem5
build:native-alpinelinux-edge

00:10:37

passed #342147
librem5
build:native-debian-bullseye

00:12:24

 
  Test+Docs
passed #342151
librem5
build-gtkdoc

00:05:01

passed #342153
librem5
check-license-headers

00:03:12

passed #342152
librem5
check-po

00:00:35

passed #342155
librem5
test:smoke:one-output

00:02:03

passed #342156
librem5
test:smoke:two-outputs

00:01:46

passed #342154
librem5
unit-test:native-alpinelinux-edge

00:00:45

passed #342150
librem5
unit-test:native-debian-bullseye

00:04:35

13.8%
 
  Package
passed #342157
librem5:arm64
package:deb-debian-bullseye:arm64

00:18:35