Revert "Disable CtsInstallHostTestCases in TEST_MAPPING postsubmit run" This reverts commit 2241979f3b939a421db0fb3ef5f569edb31cd080. Reason for revert: b/157358803 Exempt-From-Owner-Approval: revert earlier CL. Change-Id: Idd21368b165271299c15c903f0f3b988f3a40b14