deps: update LJM to fix grey overlay

Updates LJM to fix grey overlay with "user is having connectivity
issues" caused by remote track overwrite.

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#86961786be79ad0809a0c0775461da2b3c85deda",
-      "from": "github:jitsi/lib-jitsi-meet#86961786be79ad0809a0c0775461da2b3c85deda",
+      "version": "github:jitsi/lib-jitsi-meet#34f728456eb5e8e9817bdaf999e4702bac2ee6ce",
+      "from": "github:jitsi/lib-jitsi-meet#34f728456eb5e8e9817bdaf999e4702bac2ee6ce",
       "requires": {
         "@jitsi/sdp-interop": "0.1.13",
         "@jitsi/sdp-simulcast": "0.2.1",

package.json

     "jsc-android": "224109.1.0",
     "jsrsasign": "8.0.12",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#86961786be79ad0809a0c0775461da2b3c85deda",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#34f728456eb5e8e9817bdaf999e4702bac2ee6ce",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.4",
     "moment": "2.19.4",