Associate native MeasuredText with Java one.

To measure text beforehand, remove static layout dependency from
MeasuredText. Now MeasuredText can compute native measured text
by itself and StaticLayout use it for line breaking.

This CL introduce one additional JNI method call per paragraph during
line breaking but looks negligible cost.

Here is a raw performance test result on walleye-userdebug.

StaticLayoutPerfTest (median, N=100):
createRandom:          7,879,440 -> 7,964,789 (+1.08%)
createRandom Balanced: 7,835,192 -> 7,848,151 (+0.17%)

TextViewOnMeasurePerfTest (median, N=100):
measure_AtMost:       92,599,175 ->  93,027,121 (+0.47%)
measure_Exactly:      89,949,922 ->  90,439,886 (+0.54%)
measure_Unspecified: 148,645,916 -> 150,047,694 (+0.94%)

Bug: 67504091
Test: bit CtsTextTestCases:*
Test: bit CtsWidgetTestCases:*
Test: bit CtsGraphicsTestCases:*
Test: bit FrameworksCoreTests:android.text.StaticLayoutTest
Change-Id: Ie932903845645e50cfa0cb428babb31a44babc47