Add option to not power on on start

By default, on start, the device is powered on. To prevent this
behavior, add a new option --no-power-on.

Fixes #3148 <https://github.com/Genymobile/scrcpy/issues/3148>
PR #3210 <https://github.com/Genymobile/scrcpy/pull/3210>

app/data/bash-completion/scrcpy

@@ -29,6 +29,7 @@ _scrcpy() {
         -N --no-display
         --no-key-repeat
         --no-mipmaps
+        --no-power-on
         --otg
         -p --port=
         --power-off-on-close