Font size bar chart (#645)

Increas font size bar chart

small fix that improves the readability of the values on bar charts

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractWeekChartFragment.java

@@ -115,6 +115,7 @@ public abstract class AbstractWeekChartFragment extends AbstractChartFragment {
 
         BarData barData = new BarData(set);
         barData.setValueTextColor(Color.GRAY); //prevent tearing other graph elements with the black text. Another approach would be to hide the values cmpletely with data.setDrawValues(false);
+        barData.setValueTextSize(10f);
 
         LimitLine target = new LimitLine(mTargetValue);
         barChart.getAxisLeft().removeAllLimitLines();