audio policy: minor log and dump fixes

Fix DeviceDescriptorBase dump formatting and add more
info to getOffoadSupport() verbose log.

Test: adb shell dumpsys media.audio_policy
Change-Id: Ibbc4f80305d5b326c316f7510a03688ebeadb33a
diff --git a/media/libaudiofoundation/DeviceDescriptorBase.cpp b/media/libaudiofoundation/DeviceDescriptorBase.cpp
index a3e9589..5cfea81 100644
--- a/media/libaudiofoundation/DeviceDescriptorBase.cpp
+++ b/media/libaudiofoundation/DeviceDescriptorBase.cpp
@@ -122,9 +122,9 @@
             spaces, "", ::android::toString(mDeviceTypeAddr.mType).c_str()));
 
     dst->append(base::StringPrintf(
-            "%*s- supported encapsulation modes: %u", spaces, "", mEncapsulationModes));
+            "%*s- supported encapsulation modes: %u\n", spaces, "", mEncapsulationModes));
     dst->append(base::StringPrintf(
-            "%*s- supported encapsulation metadata types: %u",
+            "%*s- supported encapsulation metadata types: %u\n",
             spaces, "", mEncapsulationMetadataTypes));
 
     if (mDeviceTypeAddr.address().size() != 0) {