Update a15 manifest

  <project name="e/os/android_packages_providers_TelephonyProvider" path="packages/providers/TelephonyProvider" remote="e" revision="2937d9ce73becf86c6d4ea6e5f2930e9c6bd381b" upstream="refs/heads/v4.0-a15" dest-branch="refs/heads/v4.0-a15" groups="pdk-cw-fs,pdk-fs"/>

  <project name="e/os/android_packages_services_SplitInstallService" path="packages/services/SplitInstallService" remote="e" revision="57a211a7eadf699514814ad3adf2b2927d2898c1" upstream="v4.0" dest-branch="v4.0"/>

  <project name="e/os/android_packages_services_Telephony" path="packages/services/Telephony" remote="e" revision="bad4597c1c4cb1d3380ba871fd4dd862acd2b8dc" upstream="refs/heads/v4.0-a15" dest-branch="refs/heads/v4.0-a15" groups="pdk-cw-fs,pdk-fs"/>

  <project name="e/os/android_prebuilts_prebuiltapks_lfs" path="external/prebuiltapks" remote="e" revision="4d29f681e008c4de6a589fea96fc3f6c9320b86a" upstream="v4.0" dest-branch="v4.0"/>

  <project name="e/os/android_prebuilts_prebuiltapks_lfs" path="external/prebuiltapks" remote="e" revision="c166acaa19793297c5c841422758d62da003d6ad" upstream="v4.0" dest-branch="v4.0"/>

  <project name="e/os/android_system_core" path="system/core" remote="e" revision="d2ffe99192b240cf1d93c67d9d6d21b640b88618" upstream="refs/heads/v4.0-a15" dest-branch="refs/heads/v4.0-a15" groups="pdk"/>

  <project name="e/os/android_vendor_apn" path="vendor/apn" remote="e" revision="e7f82b9e5bba60fd0be652b3bc38a2d57896e89b" upstream="develop" dest-branch="develop"/>

  <project name="e/os/android_vendor_eos" path="vendor/eos" remote="e" revision="82d3513027dd8b86f0aa1c90eb78229bb9243718" upstream="refs/heads/v4.0-a15" dest-branch="refs/heads/v4.0-a15"/>