Revert "AOSP/Music - Updated to sdkVersion 29."

This reverts commit 6fd9d1ea7805801a195219b79b8df393f6aa7e9c.

Reason for revert: same reason as b/145495831 - Need to use FUSE to access external storage media.

Change-Id: I8e5b621e2cecd0fd1631d41b7266e15d13dc8af5
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 02414ba..8bc1efb 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -24,7 +24,7 @@
 
     <!-- SDK Versions -->
     <uses-sdk android:minSdkVersion="19"
-              android:targetSdkVersion="29"/>
+              android:targetSdkVersion="28"/>
 
     <!-- Permissions -->
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>