fix: fontSize prop fallback on initial measure size calculation

Author: hejsztynx

android/src/main/java/com/swmansion/enriched/textinput/MeasurementStore.kt

@@ -137,7 +137,7 @@ object MeasurementStore {
     props: ReadableMap?,
   ): Float {
     val propsFontSize = props?.getDouble("fontSize")?.toFloat()
-    if (propsFontSize == null) return defaultView.textSize
+    if (propsFontSize == null || propsFontSize <= 0) return defaultView.textSize
 
     return ceil(pixelFromSpOrDp(propsFontSize, allowFontScalingFromProps(props)))
   }