Fix read file error in extract_apks

Bug: 301409551
Test: build
Change-Id: I353efea233e524c838298447b08743eeeedbb263
diff --git a/cmd/extract_apks/main.go b/cmd/extract_apks/main.go
index 2e71fe1..a7308b4 100644
--- a/cmd/extract_apks/main.go
+++ b/cmd/extract_apks/main.go
@@ -76,8 +76,8 @@
 	if err != nil {
 		return nil, err
 	}
-	bytes := make([]byte, tocFile.FileHeader.UncompressedSize64)
-	if _, err := rc.Read(bytes); err != nil && err != io.EOF {
+	bytes, err := io.ReadAll(rc)
+	if err != nil {
 		return nil, err
 	}
 	rc.Close()