I have found this vector drawable resource here. What I would like to do is flip it so the X is on the other side.
I managed to do this in the layo
You were almost doing it, just with the wrong pivot point.
It needs to flip around the centre of the image, so looking at the viewport the full width is 24, so the pivot point needs to be at 12.
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportHeight="24"
android:viewportWidth="24">
<group
android:name="rotationGroup"
android:pivotX="12"
android:scaleX="-1" >
<path
android:fillColor="#FFFFFF"
android:pathData="M15,14C17.67,14 23,15.33 23,18V20H7V18C7,15.33 12.33,14 15,14M15,12A4,4 0 0,1 11,8A4,4 0 0,1 15,4A4,4 0 0,1 19,8A4,4 0 0,1 15,12M5,9.59L7.12,7.46L8.54,8.88L6.41,11L8.54,13.12L7.12,14.54L5,12.41L2.88,14.54L1.46,13.12L3.59,11L1.46,8.88L2.88,7.46L5,9.59Z" />
</group>
</vector>