Clean up database tables for launch

PiperOrigin-RevId: 244267255

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheFileMetadataIndex.java

@@ -107,7 +107,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       int version =
           VersionTable.getVersion(
               readableDatabase, VersionTable.FEATURE_CACHE_FILE_METADATA, hexUid);
-      if (version == VersionTable.VERSION_UNSET || version > TABLE_VERSION) {
+      if (version != TABLE_VERSION) {
         SQLiteDatabase writableDatabase = databaseProvider.getWritableDatabase();
         writableDatabase.beginTransaction();
         try {
@@ -119,9 +119,6 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
         } finally {
           writableDatabase.endTransaction();
         }
-      } else if (version < TABLE_VERSION) {
-        // There is no previous version currently.
-        throw new IllegalStateException();
       }
     } catch (SQLException e) {
       throw new DatabaseIOException(e);

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CachedContentIndex.java

@@ -63,12 +63,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
 
   /* package */ static final String FILE_NAME_ATOMIC = "cached_content_index.exi";
 
-  private static final int VERSION = 2;
-  private static final int VERSION_METADATA_INTRODUCED = 2;
   private static final int INCREMENTAL_METADATA_READ_LENGTH = 10 * 1024 * 1024;
 
-  private static final int FLAG_ENCRYPTED_INDEX = 1;
-
   private final HashMap<String, CachedContent> keyToContent;
   /**
    * Maps assigned ids to their corresponding keys. Also contains (id -> null) entries for ids that
@@ -464,6 +460,10 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
   /** {@link Storage} implementation that uses an {@link AtomicFile}. */
   private static class LegacyStorage implements Storage {
 
+    private static final int VERSION = 2;
+    private static final int VERSION_METADATA_INTRODUCED = 2;
+    private static final int FLAG_ENCRYPTED_INDEX = 1;
+
     private final boolean encrypt;
     @Nullable private final Cipher cipher;
     @Nullable private final SecretKeySpec secretKeySpec;
@@ -770,7 +770,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
                 databaseProvider.getReadableDatabase(),
                 VersionTable.FEATURE_CACHE_CONTENT_METADATA,
                 hexUid);
-        if (version == VersionTable.VERSION_UNSET || version > TABLE_VERSION) {
+        if (version != TABLE_VERSION) {
           SQLiteDatabase writableDatabase = databaseProvider.getWritableDatabase();
           writableDatabase.beginTransaction();
           try {
@@ -779,9 +779,6 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
           } finally {
             writableDatabase.endTransaction();
           }
-        } else if (version < TABLE_VERSION) {
-          // There is no previous version currently.
-          throw new IllegalStateException();
         }
 
         try (Cursor cursor = getCursor()) {

library/core/src/test/java/com/google/android/exoplayer2/offline/DefaultDownloadIndexTest.java

@@ -32,7 +32,7 @@ import org.junit.runner.RunWith;
 @RunWith(AndroidJUnit4.class)
 public class DefaultDownloadIndexTest {
 
-  private static final String EMPTY_NAME = "singleton";
+  private static final String EMPTY_NAME = "";
 
   private ExoDatabaseProvider databaseProvider;
   private DefaultDownloadIndex downloadIndex;