[GH] Simple changes to fix AbstractMethodError from issue b/204328129

Please see [b/204328129](https://issuetracker.google.com/issues/204328129) for more details on the issue.

Basically this is something necessary to help prevent weird compilation errors that happen with the Buck/Redex build toolchains that Meta uses. Not something meaningful, but since the change is dead simple I guess it shall pass.

Test: This has been something that was patched on Meta source and we've been testing it for multiple prod releases of Threads, we're only now porting the change to Google because it seems appropriate.

Fixes: b/204328129

This is an imported pull request from androidx#625.

Resolves #625
Github-Pr-Head-Sha: 0568741
GitOrigin-RevId: 023a53d
(cherry picked from https://android-review.googlesource.com/q/commit:ca6fa30821e365ed3976bbcd0202c38b9da2c842)
Merged-In: I5b3fe39e54ffd4f97234c0ff23e54f9b790b2f0f
Change-Id: I5b3fe39e54ffd4f97234c0ff23e54f9b790b2f0f

text/text/src/androidTest/java/androidx/compose/ui/text/android/CharSequenceCharacterIteratorTest.kt

@@ -0,0 +1,18 @@
+package androidx.compose.ui.text.android
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class CharSequenceCharacterIteratorTest {
+    @Test
+    fun canClone() {
+        val subject = CharSequenceCharacterIterator("", 0, 0)
+        val cloned = subject.clone()
+        assertThat(subject).isNotSameInstanceAs(cloned)
+    }
+}

text/text/src/main/java/androidx/compose/ui/text/android/CharSequenceCharacterIterator.kt

@@ -29,11 +29,12 @@ import java.text.CharacterIterator
  * @param start The index of the beginning of the range.
  * @param end The index of the end of the range.
  */
+@Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
 internal class CharSequenceCharacterIterator(
     private val charSequence: CharSequence,
     private val start: Int,
     private val end: Int
-) : CharacterIterator {
+) : Object() /* see b/204328129 */, CharacterIterator {
     private var index: Int = start
 
     /**
@@ -173,7 +174,6 @@ internal class CharSequenceCharacterIterator(
      */
     override fun clone(): Any {
         return try {
-            @Suppress("ABSTRACT_SUPER_CALL")
             super.clone()
         } catch (e: CloneNotSupportedException) {
             throw InternalError()