use SpannedStringBuilder to build a SpannedString
use SpannedStringBuilder to build a SpannedString

It turns out that copy constructors do not respect NoCopySpan. Using
SpannedStringBuilder addresses this oversight.

Bug: 11326070
Change-Id: I949ef4f477d65cf645f3b1b2651f8ce423995237

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base