Increase clip debug string limit

    <!-- UI debug setting: force anti-aliasing summary [CHAR LIMIT=50] -->

    <string name="force_msaa_summary">Enable 4x MSAA in OpenGL ES 2.0 apps</string>

    <!-- UI debug setting: show when non-rectangular clip operations are used [CHAR LIMIT=50] -->

    <!-- UI debug setting: show when non-rectangular clip operations are used [CHAR LIMIT=100] -->

    <string name="show_non_rect_clip">Debug non-rectangular clip operations</string>

    <!-- UI debug setting: profile time taken by hardware acceleration to render apps [CHAR LIMIT=25] -->