Previous patch ag/2250238 broke MtpDocumentsProviderTests since
ServiceIntentSender's constructor refers the context argument which is
null in the tests.
The CL adds a test version of the constructor which does not use the
context argument in it.
Bug: 38363487
Test: MtpDocumentsProviderTests
Change-Id: I68a1d8cb6997499e5069c33f70fd0f675aaad77c
NotificationManager.startServiceInForeground() was moved to
Context#startForegroundService. MtpDocumentsProvider should use new one.
Bug: 36794559
Test: MtpDocumentsProviderTests
Change-Id: I84723ee8c3f0f8bfe4d5ea8ad035c01c42ce8bab
(cherry picked from commit 203be491ef)
Prevously MtpDocumentsService was started as background service, then it
turns into a foreground service by calling Service#startForeground.
The workflow did not work until this, because now background activity
cannot launch a background service.
The CL starts using NotificationManager#startForegroundService to launch
MtpDocumentsService so that the service can be started as foreground
service directly.
Bug: 34468813
Test: MtpDocumentsProviderTests
Test: manual testing with connecting MTP device to Android
Change-Id: Ic35d3e92f234881846e5d82ed04d6681a83035f7
Previously MtpDocumentsProvider opens a device just after device is
connected to Android. But MtpDocumentsProvider should open MTP device on
demand so that other applications can open device if user starts to use
the application before using MtpDocumentsProvider.
BUG=26625708
Change-Id: I6083b8c7cef49ee6e9fb0d15ca4adc129734f3eb
