Automerge: [libc++] Update owners of Android CI in BOT_OWNERS.txt (#157183)

Add pirama-arumuga-nainar, Sharjeel-Khan and remove previous owner.

Author: pirama-arumuga-nainar

libcxx/utils/ci/BOT_OWNERS.txt

@@ -18,6 +18,6 @@ E: [email protected]
 D: AIX, ppc64le
 
 N: Android libc++
-E: rprichard@google.com
-H: rprichard
+E: [email protected], sharjeelkhan@google.com
+G: pirama-arumuga-nainar, Sharjeel-Khan
 D: Emulator-based x86[-64] libc++ CI testing