Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/4685c54ed2e5
Author: Luke Chang <lchang@mozilla.com>
Desc: Merge pull request #32317 from luke-chang/1212726_spatialnavigator_check_navigable

Bug 1212726 - SpatialNavigator should check if an element is navigable before focusing it, r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/adfd710a78b0
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1212726 - SpatialNavigator should check if an element is navigable before focusing it

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https://hg.mozilla.org/integration/gaia-central/rev/68f78e1b448d
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #32233 from mikehenrty/bug-1205040-tracking-protection-setting

Bug 1205040 - Add tracking protection toggle to Browsing Privacy panel

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https://hg.mozilla.org/integration/gaia-central/rev/ed644a705546
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge branch 'bug-1205040-tracking-protection-setting' of https://github.com/mikehenrty/gaia into mikehenrty-bug-1205040-tracking-protection-setting

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https://hg.mozilla.org/integration/gaia-central/rev/6c5ff2dc294c
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1205040 - Add tracking protection toggle to Browsing Privacy panel

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "1dd0b1f757986352597b191d08a12dea26a0866f", 
+        "git_revision": "40f71f6242f7f2411cb3196d30a53af833fc52a6", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "12a4af7c2a5580de6fe314a95312591db23fdccc", 
+    "revision": "4685c54ed2e5b29b473ee41f6fe926d5ff4113d4", 
     "repo_path": "integration/gaia-central"
 }