Introduce new constructor for not copying NoCopySpan

To hold the original text in PrecomputedText, need to create
SpannableString, but copying NoCopySpan causes some side effect.
This CL introduces a way of copying SpannableString/SpannedString
with all spans other than NoCopySpan.

Bug: 72998298
Bug: 35638900
Test: atest CtsWidgetTestCases:EditTextTest
    CtsWidgetTestCases:TextViewFadingEdgeTest
    FrameworksCoreTests:TextViewFallbackLineSpacingTest
    FrameworksCoreTests:TextViewTest FrameworksCoreTests:TypefaceTest
    CtsGraphicsTestCases:TypefaceTest CtsWidgetTestCases:TextViewTest
    CtsTextTestCases FrameworksCoreTests:android.text
    CtsWidgetTestCases:TextViewPrecomputedTextTest

Change-Id: I20dea2114ccaa54b16ff679c97682a5003f9a4c1