Add more specific subtitles and lyrics MIME types.

"srt" subtitles have a more specific MIME type of
"application/x-subrip", as listed here in Apache and therefore widely
used across the Internet:

http://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x/conf/mime.types

"lrc" lyrics have a more specific MIME type of
"application/lrc", as determined here from the archive.org scraping
of popular Internet sites:

https://discuss.httparchive.org/t/keeping-etc-mime-types-up-to-date/825

Bug: 143707020
Test: atest --test-mapping packages/providers/MediaProvider
Change-Id: I9598d1de920f29fbda7efa3c17b5632f756a65f2

mime/java-res/android.mime.types

@@ -46,6 +46,7 @@
 # <extension1> and <extension2> are mapped (or remapped) to <mimeType>.
 
 ?application/epub+zip epub
+?application/lrc lrc
 ?application/pkix-cert cer
 ?application/rss+xml rss
 ?application/sdp sdp
@@ -65,6 +66,7 @@
 ?application/x-mpegurl m3u m3u8
 ?application/x-pem-file pem
 ?application/x-pkcs12 p12 pfx
+?application/x-subrip srt
 ?application/x-webarchive webarchive
 ?application/x-webarchive-xml webarchivexml
 ?application/x-x509-server-cert crt