Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/720b99002d54
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #31871 from hfiguiere/bug1205152-shadow-root-marionette

Bug 1205152 - Use switchToShadowRoot() instead of executeScript() r=justindarc

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https://hg.mozilla.org/integration/gaia-central/rev/17f4a87de64d
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1205152 - Use switchToShadowRoot() instead of executeScript()

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https://hg.mozilla.org/integration/gaia-central/rev/13a9289c2ccc
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #31641 from gabrielesvelto/bug-1190790-fix-dialer-navigation

Bug 1190790 - Make sure that panels are populated correctly when navigating to them r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/a17e5c5becb9
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1190790 - Make sure that panels are populated correctly when navigating to them r=drs

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "6d0afb71d0fe7185fbec2690d7716632083cc504", 
+        "git_revision": "e27fd43b2f144c27011304d2863a76faa24c357a", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e2e758caa9d5c2c743abfee65895c14174ab1976", 
+    "revision": "720b99002d5423e7312128b7ba43659489f65e7d", 
     "repo_path": "integration/gaia-central"
 }