support: Move to androidx

Change-Id: I7b20f326ac481b51ba082ab3a042a11d5075352d
diff --git a/src/com/bliss/support/colorpicker/ColorPickerDialog.java b/src/com/bliss/support/colorpicker/ColorPickerDialog.java
index 32d3f4c..6b479aa 100644
--- a/src/com/bliss/support/colorpicker/ColorPickerDialog.java
+++ b/src/com/bliss/support/colorpicker/ColorPickerDialog.java
@@ -21,7 +21,7 @@
 import android.content.Context;
 import android.graphics.PixelFormat;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.Window;
diff --git a/src/com/bliss/support/colorpicker/ColorPickerPreference.java b/src/com/bliss/support/colorpicker/ColorPickerPreference.java
index a201305..a75f4a2 100644
--- a/src/com/bliss/support/colorpicker/ColorPickerPreference.java
+++ b/src/com/bliss/support/colorpicker/ColorPickerPreference.java
@@ -28,7 +28,7 @@
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.support.v7.preference.*;
+import androidx.preference.*;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewGroup.LayoutParams;