Update BiDiTest app for Gravity renaming

    <string name="button3_text">Button3</string>

    <string name="button3_text">Button3</string>

    <string name="button4_text">Button4</string>

    <string name="button4_text">Button4</string>

    <string name="button_right_text">Right</string>

    <string name="button_right_text">Right</string>

    <string name="button_after_text">After</string>

    <string name="button_after_text">End</string>

    <string name="button_left_text">Left</string>

    <string name="button_left_text">Left</string>

    <string name="button_before_text">Before</string>

    <string name="button_before_text">Start</string>

    <string name="button_requestlayout_text">Request Layout</string>

    <string name="button_requestlayout_text">Request Layout</string>

    <string name="textview_text">This is a text for a TextView</string>

    <string name="textview_text">This is a text for a TextView</string>

    <string name="edittext_text">mmmmmmmmmmmmmmmmmmmmmmmm</string>

    <string name="edittext_text">mmmmmmmmmmmmmmmmmmmmmmmm</string>