Removing some bitmap drawables.

<?xml version="1.0" encoding="utf-8"?>

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<inset xmlns:android="http://schemas.android.com/apk/res/android"

    android:drawable="@drawable/quantum_panel_shape"

    android:insetBottom="@dimen/quantum_panel_outer_padding"

    android:insetLeft="@dimen/quantum_panel_outer_padding"

    android:insetRight="@dimen/quantum_panel_outer_padding"

    android:insetTop="@dimen/quantum_panel_outer_padding" />