Bumping gaia.json for 7 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/e12db0c43670
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #11907 from dominickuo/music-bluetooth-avrcp-new

Bug 897882 - [Music] Support bluetooth AVRCP 1.0 + 1.3, r=@jimporter

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https://hg.mozilla.org/integration/gaia-central/rev/7aaffab41e89
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 897882 - [music] Add Media remote controls and enable AVRCP 1.0 + 1.3

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https://hg.mozilla.org/integration/gaia-central/rev/c6d5a0f09273
Author: b2gautomation <jonallengriffin@gmail.com>
Desc: Update gaia-ui-tests.json; Merge pull request #1350 from zacc/xfail_imei_915038

Xfail test_MMI due to bug 915038

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https://hg.mozilla.org/integration/gaia-central/rev/bc282713179e
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #12106 from jaoo/911874

Bug 911874 - [zffos1.1][P2][MMS] The DuT does not support size of 500 KB for MMS for one fo the mcc/mnc of Mexico operator. r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/68c33969ec7e
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 911874 - [zffos1.1][P2][MMS](The DuT does not support size of 500 KB for MMS, according to Annex 059

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https://hg.mozilla.org/integration/gaia-central/rev/7a797e6c167d
Author: Fernando Rodríguez Sela <frsela@tid.es>
Desc: Merge pull request #11294 from frsela/STK/Bug896356

Bug 896356 - [Buri][REG][STK]cannot get the end session TR for select item command

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https://hg.mozilla.org/integration/gaia-central/rev/1aea24e82333
Author: Fernando Rodriguez Sela <frsela@tid.es>
Desc: Send STK_RESULT_UICC_SESSION_TERM_BY_USER when we lost visibility