fix(android): fix screenCaptured crash on Android 13 and lower

[m1ga]

Startup crash introduced by #14311 and devices with Android 13 or lower. new Activity.ScreenCaptureCallback() is not available on these devices but it still tries to create the variable.

Fix:
initialize the variable in onCreate and add a Android SDK version check around it

Test:
Start any app on an Android 13 device. Master will crash right away.

10-23 16:37:55.291 28706 28706 E AndroidRuntime: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/app/Activity$ScreenCaptureCallback;
10-23 16:37:55.291 28706 28706 E AndroidRuntime:        at java.lang.Class.newInstance(Native Method)

[cb1kenobi]

LGTM!