Render gifs in gif search as MP4s.

...va/org/thoughtcrime/securesms/attachments/Attachment.java

...houghtcrime/securesms/attachments/DatabaseAttachment.java

...rime/securesms/attachments/MmsNotificationAttachment.java

...thoughtcrime/securesms/attachments/PointerAttachment.java

...oughtcrime/securesms/attachments/TombstoneAttachment.java

...org/thoughtcrime/securesms/attachments/UriAttachment.java

...crime/securesms/components/ConversationItemThumbnail.java

.../org/thoughtcrime/securesms/components/ThumbnailView.java

...java/org/thoughtcrime/securesms/contactshare/Contact.java

...ghtcrime/securesms/conversation/ConversationActivity.java

...ghtcrime/securesms/conversation/ConversationFragment.java

...g/thoughtcrime/securesms/database/AttachmentDatabase.java

...va/org/thoughtcrime/securesms/database/MediaDatabase.java

...java/org/thoughtcrime/securesms/database/MmsDatabase.java

...a/org/thoughtcrime/securesms/database/MmsSmsDatabase.java

...crime/securesms/database/helpers/SQLCipherOpenHelper.java

...crime/securesms/dependencies/ApplicationDependencies.java

...ava/org/thoughtcrime/securesms/giph/model/GiphyImage.java

...rg/thoughtcrime/securesms/giph/model/GiphyPagination.java

.../org/thoughtcrime/securesms/giph/model/GiphyResponse.java