Add transaction info on ContextHubService dump

=================== TRANSACTIONS ====================
Transaction History:
07/21 19:14:40.707 Load (appId = 0x476f6f6754000004, package = com.google.android.chre.pts.app)
07/21 19:14:39.398 Unload (appId = 0x476f6f6754000003, package = com.google.android.chre.pts.app)
07/21 19:14:37.278 Load (appId = 0x476f6f6754000003, package = com.google.android.chre.pts.app)
07/21 19:14:28.265 Query (package = com.google.uid.shared:10194)
07/21 19:14:15.530 Query (package = com.google.android.apps.scone)
07/21 19:14:12.768 Query (package = com.google.oslo)
07/21 19:14:12.766 Query (package = com.google.oslo)
07/21 19:14:12.763 Query (package = com.google.oslo)
07/21 19:14:12.760 Query (package = com.google.oslo)
07/21 19:14:12.756 Query (package = com.google.oslo)
07/21 19:14:12.753 Query (package = com.google.oslo)
07/21 19:14:11.377 Query (package = android.uid.system:1000)

Bug: 121033022
Test: adb shell dumpsys contexthub
Change-Id: I253ce8d8f74ab06d979f4ab6de141911b30c20b8