improve gateway connection setup animation

app/src/main/res/drawable/main_btn_glow.xml

app/src/main/res/drawable/on_off_btn_an1.png

app/src/main/res/drawable/on_off_btn_an2.png

app/src/main/res/drawable/on_off_btn_an3.png

app/src/main/res/drawable/on_off_btn_an4.png

app/src/main/res/drawable/on_off_btn_start_animation1.png

app/src/main/res/drawable/on_off_btn_start_animation2.png

app/src/main/res/drawable/on_off_btn_start_animation3.png

app/src/main/res/drawable/on_off_btn_start_animation4.png

app/src/main/res/drawable/on_off_btn_start_animation5.png