Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f46fc3ca9d9f
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #28547 from sean2449/Bug_1136622

Bug 1136622 - [Stingray] expose isVisible and focus API for app authenti..., r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/80daebae4e10
Author: Sung Chiu <suchiu@mozilla.com>
Desc: Bug 1136622 - [Stingray] expose isVisible and focus API for app authentication dialog

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https://hg.mozilla.org/integration/gaia-central/rev/85b5bfd554a5
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #28624 from sean2449/Bug_1136623

Bug 1136623 - [Stingray] expose isVisible and focus API for activities, r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/b12023c35290
Author: Sung Chiu <suchiu@mozilla.com>
Desc: Bug 1136623 - [Stingray] expose isVisible and focus API for activities

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https://hg.mozilla.org/integration/gaia-central/rev/becf31e0f37c
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #28620 from huchengtw-moz/bug-1136606-api-for-permission-manager

Bug 1136606 - [Stingray] expose isVisible and focus API for permission_m..., r=lchang

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https://hg.mozilla.org/integration/gaia-central/rev/982769aacd0e
Author: John Hu <johu@mozilla.com>
Desc: Bug 1136606 - [Stingray] expose isVisible and focus API for permission_manager

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "0017f2bbc63781a5409644b664d80ebaa1543653", 
+        "git_revision": "f6049c71eeb8e93ea80e04b35856fe91790294f0", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "2f6fbd430b0ee8042f103c52e4ead2d87f37e22e", 
+    "revision": "f46fc3ca9d9f48e302934c667a72f19a58847fd6", 
     "repo_path": "integration/gaia-central"
 }