Replace illustration for sending data from removable drive

briar-android/artwork/il_transfer_data_send.svg

briar-android/artwork/il_transfer_data_send_night.svg

briar-android/artwork/transfer_data_send.svg

...iarproject/briar/android/removabledrive/SendFragment.java

...oid/src/main/res/drawable-night/il_transfer_data_send.xml

...r-android/src/main/res/drawable/ic_transfer_data_send.xml

...r-android/src/main/res/drawable/il_transfer_data_send.xml

...droid/src/main/res/layout/fragment_transfer_data_send.xml