Update min_sdk_version to T.

Without this change, there are crashes when this module is installed on T.

Bug: 267575060
Test: Manually verified that /apex/com.android.sdkext/bin/derive_classpath runs with this fix, crashes without this fix.
Change-Id: Iae6d81d7e489059b708adfa509c4ed20f428a120
1 file changed