Update a15 manifest

  <project name="e/os/android_packages_providers_TelephonyProvider" path="packages/providers/TelephonyProvider" remote="e" revision="2937d9ce73becf86c6d4ea6e5f2930e9c6bd381b" upstream="refs/heads/v3.6-a15" dest-branch="refs/heads/v3.6-a15" groups="pdk-cw-fs,pdk-fs"/>

  <project name="e/os/android_packages_services_SplitInstallService" path="packages/services/SplitInstallService" remote="e" revision="57a211a7eadf699514814ad3adf2b2927d2898c1" upstream="v3.6" dest-branch="v3.6"/>

  <project name="e/os/android_packages_services_Telephony" path="packages/services/Telephony" remote="e" revision="806762780419ed533d521cec87262a4315e6c53a" upstream="refs/heads/v3.6-a15" dest-branch="refs/heads/v3.6-a15" groups="pdk-cw-fs,pdk-fs"/>

  <project name="e/os/android_prebuilts_prebuiltapks_lfs" path="external/prebuiltapks" remote="e" revision="4c5595e192c1b22b60746ce8fe05d6f986f6e0b2" upstream="v3.6" dest-branch="v3.6"/>

  <project name="e/os/android_prebuilts_prebuiltapks_lfs" path="external/prebuiltapks" remote="e" revision="f73b61597384c13a2548db22715b3989f8722e04" upstream="v3.6" dest-branch="v3.6"/>

  <project name="e/os/android_system_core" path="system/core" remote="e" revision="d2ffe99192b240cf1d93c67d9d6d21b640b88618" upstream="refs/heads/v3.6-a15" dest-branch="refs/heads/v3.6-a15" groups="pdk"/>

  <project name="e/os/android_vendor_apn" path="vendor/apn" remote="e" revision="e2f9c6c871b82ed81a58bfb127100ab100ee8736" upstream="develop" dest-branch="develop"/>

  <project name="e/os/android_vendor_eos" path="vendor/eos" remote="e" revision="f0f2a85c7052e73e9bdaaef538fa82a1a508bd2e" upstream="refs/heads/v3.6-a15" dest-branch="refs/heads/v3.6-a15"/>