drm_hwcomposer: CI: launch_cvd: run modem_simulator

The modem simulator is currently disabled because, in an earlier version
of cuttlefish, it was preventing drmhwc from launching. However, the
missing service causes a lot of noise in logcat as the ServiceManager
continuously looks for the IRadioModem service.

Since the cuttlefish modem simulator is now working with drmhwc on
Android16, enable the modem simulator and reduce the logcat and Activity
Manager noise.

Also, while here, remove the executable bit from launch-cvd.sh since it
is only sourced, not run directly.

Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>

.ci/android/launch-cvd.sh

@@ -70,7 +70,7 @@ HOME=/cuttlefish launch_cvd \
   -blank_data_image_mb 65536 \
   -enable_audio=false \
   -enable-sandbox=false \
-  -enable_modem_simulator=false \
+  -enable_modem_simulator=true \
   -vsock_guest_cid=$VSOCK_CID \
   -cpus="${FDO_CI_CONCURRENT:-4}" \
   -extra_bootconfig_args="androidboot.vendor.apex.com.android.hardware.graphics.composer=com.android.hardware.graphics.composer.drm_hwcomposer"
@@ -78,10 +78,6 @@ HOME=/cuttlefish launch_cvd \
 while [ "$(adb shell dumpsys -l | grep SurfaceFlinger)" = "" ] ; do sleep 1; done
 adb shell dumpsys SurfaceFlinger | grep GLES
 
-# Wait for drmhwc to start up
-while [ "$(adb logcat -d | grep -i hwc | grep -i ActivityManager)" = "" ] ; do sleep 1; done
-adb logcat -d | grep -i hwc
-
 adb logcat -d | grep -i vkms
 echo "Running ro.build.version.sdk: $(adb shell getprop ro.build.version.sdk)"
 echo "Running ro.build.version.release: $(adb shell getprop ro.build.version.release)"
@@ -151,9 +147,6 @@ adb install --force-non-staged /new_apex/com.android.hardware.graphics.composer.
 adb logcat -c
 adb reboot
 adb wait-for-device devices
-while [ "$(adb logcat -d | grep -i hwc | grep -i ActivityManager)" = "" ] ; do sleep 1; done
-adb logcat -d | grep -i hwc
-
 fdo_log_section_end push_new_apex
 
 # If this service is missing, cts-tradefed will fail device pretests