Add bootclasspath_fragments to platform-bootclasspath.

Bug: 180105615
Test: atest CtsClasspathsTestCases
Merged-In: I72c76685d337c683b79ccd38c8f3b91816e34102
Change-Id: If7c115f3fc39b908ee809d7734fad8c387f05ab7
1 file changed