Start align text when displaying in smallest size otherwise center.

app/src/main/java/org/thoughtcrime/securesms/mediasend/v2/text/TextStoryTextWatcher.kt

@@ -3,6 +3,7 @@ package org.thoughtcrime.securesms.mediasend.v2.text
 import android.text.Editable
 import android.text.TextWatcher
 import android.util.TypedValue
+import android.view.Gravity
 import android.widget.EditText
 import android.widget.TextView
 import org.signal.core.util.BreakIteratorCompat
@@ -30,6 +31,12 @@ class TextStoryTextWatcher private constructor(private val textView: TextView) :
         else -> 18f
       }
 
+      if (expectedTextSize < 24f) {
+        textView.gravity = Gravity.START
+      } else {
+        textView.gravity = Gravity.CENTER
+      }
+
       textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, DimensionUnit.DP.toPixels(expectedTextSize))
     }