[C-5164] Add max height to mobile ComposerInput (#10044)

Author: Kyle-Shanks

packages/mobile/src/components/composer-input/ComposerInput.tsx

@@ -66,7 +66,8 @@ const useStyles = makeStyles(({ spacing, palette, typography }) => ({
     backgroundColor: 'transparent',
     paddingLeft: spacing(4),
     paddingVertical: spacing(2),
-    borderRadius: spacing(1)
+    borderRadius: spacing(1),
+    maxHeight: 240
   },
   composeTextInput: {
     fontSize: typography.fontSize.medium,