Fixed CtsWidgetTestCases TextViewTest for WearOS

Two tests were failing on wear os due to differences in default font
weight compared with handheld. Modified to not assume default value.

Bug: 262536799

Test: atest CtsWidgetTestCases:android.widget.cts.TextViewTest

Change-Id: Ic525297476f7f7ede03e30459e6b04deaba5534d