Update release note for 1.9.0-alpha01

#cherrypick

PiperOrigin-RevId: 822026846
(cherry picked from commit 24a01ab)

Author: oceanjules

RELEASENOTES.md

@@ -7,88 +7,6 @@
 This release includes the following changes since
 [1.8.0 release](#180-2025-07-30):
 
-*   Common Library:
-*   ExoPlayer:
-*   CompositionPlayer:
-*   Transformer:
-*   Track Selection:
-*   Extractors:
-*   Inspector:
-*   Audio:
-*   Video:
-*   Text:
-*   Metadata:
-*   Image:
-*   DataSource:
-*   DRM:
-*   Effect:
-*   Muxers:
-*   IMA extension:
-*   Session:
-*   UI:
-*   Downloads:
-*   OkHttp extension:
-*   Cronet extension:
-*   RTMP extension:
-*   HLS extension:
-*   DASH extension:
-*   Smooth Streaming extension:
-*   RTSP extension:
-*   Decoder extensions (FFmpeg, VP9, AV1, etc.):
-*   MIDI extension:
-*   Leanback extension:
-*   Cast extension:
-*   Test Utilities:
-*   Remove deprecated symbols:
-
-## 1.9
-
-### 1.9.0-alpha01 (2025-10-22)
-
-This release includes the following changes since
-[1.8.0 release](#180-2025-07-30):
-
-*   Common Library:
-*   ExoPlayer:
-*   CompositionPlayer:
-*   Transformer:
-*   Track Selection:
-*   Extractors:
-*   Inspector:
-*   Audio:
-*   Video:
-*   Text:
-*   Metadata:
-*   Image:
-*   DataSource:
-*   DRM:
-*   Effect:
-*   Muxers:
-*   IMA extension:
-*   Session:
-*   UI:
-*   Downloads:
-*   OkHttp extension:
-*   Cronet extension:
-*   RTMP extension:
-*   HLS extension:
-*   DASH extension:
-*   Smooth Streaming extension:
-*   RTSP extension:
-*   Decoder extensions (FFmpeg, VP9, AV1, etc.):
-*   MIDI extension:
-*   Leanback extension:
-*   Cast extension:
-*   Test Utilities:
-*   Remove deprecated symbols:
-
-## 1.9
-
-### 1.9.0-alpha01 (2025-10-22)
-
-This release includes the following changes since
-[1.8.0 release](#180-2025-07-30):
-
 *   Common Library:
     *   Update `minSdk` to `23` in line with other AndroidX libraries.
     *   Add `PlayerTransferState`, which facilitates transferring the playback
@@ -276,7 +194,7 @@ This release includes the following changes since
         ([#2580](https://github.com/androidx/media/pull/2580)).
     *   Avoid potential delays caused by handling routing change callbacks at
         the beginning of playback
-        ([#2646]()https://github.com/androidx/media/issues/2646).
+        ([#2646](https://github.com/androidx/media/issues/2646)).
     *   Allow codec reuse for EAC3, EAC3-JOC and AC-4 formats
         ([#1346](https://github.com/androidx/media/pull/1346)).
     *   Add support for float PCM samples in `Sonic`.
@@ -418,7 +336,7 @@ This release includes the following changes since
         by the user ([#2606](https://github.com/androidx/media/issues/2606)).
     *   Avoid crashes caused by invalid manifest updates that were not reported
         as player errors
-        ([#2805](https://github.com/androidx/media/issues/2805))).
+        ([#2805](https://github.com/androidx/media/issues/2805)).
 *   RTSP extension:
     *   Handle error of missing RTP packets when processing fragmented NAL units
         for H264 and H265