android-tools: Fix inconsistency between selinux configurations

ConditionPathExists is set to /etc/usb-debugging-enabled as part of meta-oe/
recipes-devtools/android-tools/android-tools/android-tools-adbd.service file.
However, in meta-oe/dynamic-layers/selinux/recipes-devtool/android-tools/
android-tools/android-tools-adbd.service file ConditionPathExists is set to
/var/usb-debugging-enabled

This causes an internal inconsistency between selinux-enabled and -disabled
configurations.

Hence, change ConditionPathExists=/var/usb-debugging-enabled to
ConditionPathExists=/etc/usb-debugging-enabled

Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Signed-off-by: Raghuvarya S <quic_raghuvar@quicinc.com>

meta-oe/dynamic-layers/selinux/recipes-devtool/android-tools/android-tools/android-tools-adbd.service

@@ -1,6 +1,6 @@
 [Unit]
 Description=Android Debug Bridge
-ConditionPathExists=/var/usb-debugging-enabled
+ConditionPathExists=/etc/usb-debugging-enabled
 Before=android-system.service
 
 [Service]