Attempt to relaunch agent/service instead of dying instantly.

lib/units/device/plugins/service.js

@@ -69,7 +69,6 @@ module.exports = syrup.serial()
             .timeout(10000)
         })
         .then(function(out) {
-          lifecycle.share('Agent shell', out)
           streamutil.talk(log, 'Agent says: "%s"', out)
         })
         .then(function() {
@@ -80,10 +79,33 @@ module.exports = syrup.serial()
           agent.socket = conn
           agent.writer = new ms.DelimitingStream()
           agent.writer.pipe(conn)
-          lifecycle.share('Agent connection', conn)
+          return prepareForAgentDeath(conn)
         })
     }
 
+    function prepareForAgentDeath(conn) {
+      function endListener() {
+        var startTime = Date.now()
+        log.important('Agent connection ended, attempting to relaunch')
+        openService()
+          .timeout(5000)
+          .then(function() {
+            log.important('Agent relaunched in %dms', Date.now() - startTime)
+          })
+          .catch(function(err) {
+            log.fatal('Agent connection could not be relaunched', err.stack)
+            lifecycle.fatal()
+          })
+      }
+
+      conn.once('end', endListener)
+
+      conn.on('error', function(err) {
+        log.fatal('Agent connection had an error', err.stack)
+        lifecycle.fatal()
+      })
+    }
+
     function stopAgent() {
       return devutil.killProcsByComm(
         adb
@@ -162,10 +184,33 @@ module.exports = syrup.serial()
           service.reader.on('data', handleEnvelope)
           service.writer = new ms.DelimitingStream()
           service.writer.pipe(conn)
-          lifecycle.share('Service connection', conn)
+          return prepareForServiceDeath(conn)
         })
     }
 
+    function prepareForServiceDeath(conn) {
+      function endListener() {
+        var startTime = Date.now()
+        log.important('Service connection ended, attempting to relaunch')
+        openService()
+          .timeout(5000)
+          .then(function() {
+            log.important('Service relaunched in %dms', Date.now() - startTime)
+          })
+          .catch(function(err) {
+            log.fatal('Service connection could not be relaunched', err.stack)
+            lifecycle.fatal()
+          })
+      }
+
+      conn.once('end', endListener)
+
+      conn.on('error', function(err) {
+        log.fatal('Service connection had an error', err.stack)
+        lifecycle.fatal()
+      })
+    }
+
     function handleEnvelope(data) {
       var envelope = apk.wire.Envelope.decode(data)
         , message