fix(android): move MimeTypeHelper log from error to debug

[m1ga]

This code path gets hit frequently — for example when TiUIWebView (line 556) or TiResponseCache (line 419) calls getMimeType() on a URL whose path has no file extension. For every non-media file that reaches this code path (.js, .html, .png, images, etc.), setDataSource fails with 0x80000000 (MEDIA_ERROR_UNKNOWN) and the exception is logged at ERROR level.

That's why I'm moving it from ERROR to DEBUG so it won't show:

[ERROR] TiMimeTypeHelper: (main) [8,21907] setDataSource failed: status = 0x80000000
[ERROR] TiMimeTypeHelper: (main) [910,22817] setDataSource failed: status = 0x80000000
[ERROR] TiMimeTypeHelper: (main) [4,22821] setDataSource failed: status = 0x80000000
[ERROR] TiMimeTypeHelper: (main) [929,23750] setDataSource failed: status = 0x80000000
[ERROR] TiMimeTypeHelper: (main) [6,23756] setDataSource failed: status = 0x80000000 

if you download or create files with no ending as it still works.

Also adding the filename in the DEBUG log output so it's more useful.